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CVE-2021-23980: Fixed mutation XSS on bleach.clean with specific\n combinations of allowed tags (boo#1184547)\n\n Update to 3.1.5:\n\n * replace missing ``setuptools`` dependency with ``packaging``. Thank you\n Benjamin Peterson.\n\n Update to 3.1.4 (boo#1168280, CVE-2020-6817):\n\n * ``bleach.clean`` behavior parsing style attributes could result in a\n regular expression denial of service (ReDoS). Calls to ``bleach.clean``\n with an allowed tag with an allowed ``style`` attribute were vulnerable\n to ReDoS. For example, ``bleach.clean(..., attributes={'a':\n ['style']})``.\n * Style attributes with dashes, or single or double quoted values are\n cleaned instead of passed through.\n\n update to 3.1.3 (boo#1167379, CVE-2020-6816):\n\n * Add relative link to code of conduct. (#442)\n * Drop deprecated 'setup.py test' support. (#507)\n * Fix typo: curren -> current in tests/test_clean.py (#504)\n * Test on PyPy 7\n * Drop test support for end of life Python 3.4\n * ``bleach.clean`` behavior parsing embedded MathML and SVG content with\n RCDATA tags did not match browser behavior and could result in a\n mutation XSS. Calls to ``bleach.clean`` with ``strip=False`` and\n ``math`` or ``svg`` tags and one or more of the RCDATA tags ``script``,\n ``noscript``, ``style``, ``noframes``, ``iframe``, ``noembed``, or\n ``xmp`` in the allowed tags whitelist were vulnerable to a mutation XSS.\n\n\nPatch Instructions:\n\n To install this openSUSE Security Update use the SUSE recommended installation methods\n like YaST online_update or \"zypper patch\".\n\n Alternatively you can run the command listed for your product:\n\n - openSUSE Leap 15.2:\n\n zypper in -t patch openSUSE-2021-552=1", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2021-04-14T00:00:00", "type": "suse", "title": "Security update for python-bleach (important)", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6816", "CVE-2020-6817", "CVE-2021-23980"], "modified": "2021-04-14T00:00:00", "id": "OPENSUSE-SU-2021:0552-1", "href": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/YFAKMJGUZHUTZ53ZAID6PRVP5MSLXPGV/", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2022-11-10T02:12:07", "description": "An update that fixes three vulnerabilities is now available.\n\nDescription:\n\n This update for python-bleach fixes the following issues:\n\n - CVE-2021-23980: Fixed mutation XSS on bleach.clean with specific\n combinations of allowed tags (boo#1184547)\n\n Update to 3.1.5:\n\n * replace missing ``setuptools`` dependency with ``packaging``. Thank you\n Benjamin Peterson.\n\n Update to 3.1.4 (boo#1168280, CVE-2020-6817):\n\n * ``bleach.clean`` behavior parsing style attributes could result in a\n regular expression denial of service (ReDoS). Calls to ``bleach.clean``\n with an allowed tag with an allowed ``style`` attribute were vulnerable\n to ReDoS. For example, ``bleach.clean(..., attributes={'a':\n ['style']})``.\n * Style attributes with dashes, or single or double quoted values are\n cleaned instead of passed through.\n\n update to 3.1.3 (boo#1167379, CVE-2020-6816):\n\n * Add relative link to code of conduct. (#442)\n * Drop deprecated 'setup.py test' support. (#507)\n * Fix typo: curren -> current in tests/test_clean.py (#504)\n * Test on PyPy 7\n * Drop test support for end of life Python 3.4\n * ``bleach.clean`` behavior parsing embedded MathML and SVG content with\n RCDATA tags did not match browser behavior and could result in a\n mutation XSS. Calls to ``bleach.clean`` with ``strip=False`` and\n ``math`` or ``svg`` tags and one or more of the RCDATA tags ``script``,\n ``noscript``, ``style``, ``noframes``, ``iframe``, ``noembed``, or\n ``xmp`` in the allowed tags whitelist were vulnerable to a mutation XSS.\n\n This update was imported from the openSUSE:Leap:15.2:Update update project.\n\n\nPatch Instructions:\n\n To install this openSUSE Security Update use the SUSE recommended installation methods\n like YaST online_update or \"zypper patch\".\n\n Alternatively you can run the command listed for your product:\n\n - openSUSE Backports SLE-15-SP2:\n\n zypper in -t patch openSUSE-2021-571=1", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2021-04-18T00:00:00", "type": "suse", "title": "Security update for python-bleach (important)", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6816", "CVE-2020-6817", "CVE-2021-23980"], "modified": "2021-04-18T00:00:00", "id": "OPENSUSE-SU-2021:0571-1", "href": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/UAZHEWM4ZYBZY5GDDDOMIZYEGFNANLKS/", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}], "osv": [{"lastseen": "2023-04-11T01:46:39", "description": "### Impact\n\nA [mutation XSS](https://cure53.de/fp170.pdf) affects users calling `bleach.clean` with `noscript` and a raw tag (see below) in the allowed/whitelisted tags option.\n\n### Patches\n\nv3.1.1\n\n### Workarounds\n\n* modify `bleach.clean` calls to not whitelist `noscript` and one or more of the following raw tags:\n\n```\ntitle\ntextarea\nscript\nstyle\nnoembed\nnoframes\niframe\nxmp\n```\n\n* A strong [Content-Security-Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP) without `unsafe-inline` and `unsafe-eval` [`script-src`s](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src)) will also help mitigate the risk.\n\n### References\n\n* https://bugzilla.mozilla.org/show_bug.cgi?id=1615315\n* https://cure53.de/fp170.pdf\n* https://nvd.nist.gov/vuln/detail/CVE-2020-6802\n* https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleach\n\n### Credits\n\n* Reported by [Yaniv Nizry](https://twitter.com/ynizry) from the CxSCA AppSec group at Checkmarx\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue at [https://github.com/mozilla/bleach/issues](https://github.com/mozilla/bleach/issues)\n* Email us at [security@mozilla.org](mailto:security@mozilla.org)\n", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2020-02-24T17:33:44", "type": "osv", "title": "XSS in Bleach when noscript and raw tag whitelisted", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802"], "modified": "2023-04-11T01:46:34", "id": "OSV:GHSA-Q65M-PV3F-WR5R", "href": "https://osv.dev/vulnerability/GHSA-q65m-pv3f-wr5r", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2022-05-12T01:18:57", "description": "In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean with noscript and a raw tag in the allowed/whitelisted tags option.", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "baseScore": 6.1, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "userInteraction": "REQUIRED", "version": "3.1"}, "impactScore": 2.7}, "published": "2020-03-24T22:15:00", "type": "osv", "title": "PYSEC-2020-27", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802"], "modified": "2021-03-30T22:15:00", "id": "OSV:PYSEC-2020-27", "href": "https://osv.dev/vulnerability/PYSEC-2020-27", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-04-11T01:47:09", "description": "### Impact\n\n`bleach.clean` behavior parsing style attributes could result in a regular expression denial of service (ReDoS).\n\nCalls to ``bleach.clean`` with an allowed tag with an allowed ``style`` attribute are vulnerable to ReDoS. For example, ``bleach.clean(..., attributes={'a': ['style']})``.\n\n### Patches\n\n3.1.4\n\n### Workarounds\n\n* do not whitelist the style attribute in `bleach.clean` calls\n\n* limit input string length\n\n### References\n\n* https://bugzilla.mozilla.org/show_bug.cgi?id=1623633\n* https://www.regular-expressions.info/redos.html\n* https://blog.r2c.dev/posts/finding-python-redos-bugs-at-scale-using-dlint-and-r2c/\n* https://vulners.com/cve/CVE-2020-6817\n\n### Credits\n\n* Reported by schwag09 of r2c\n\n### For more information\nIf you have any questions or comments about this advisory:\n\n* Open an issue at https://github.com/mozilla/bleach/issues\n* Email us at security@mozilla.org", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-03-30T19:45:56", "type": "osv", "title": "regular expression denial-of-service (ReDoS) in Bleach", "bulletinFamily": "software", "cvss2": {}, "cvelist": ["CVE-2020-6817"], "modified": "2023-04-11T01:47:05", "id": "OSV:GHSA-VQHP-CXGC-6WMM", "href": "https://osv.dev/vulnerability/GHSA-vqhp-cxgc-6wmm", "cvss": {"score": 0.0, "vector": "NONE"}}, {"lastseen": "2022-05-11T21:11:08", "description": "In Mozilla Bleach before 3.1.4, `bleach.clean` behavior parsing style attributes could result in a regular expression denial of service (ReDoS).", "cvss3": {}, "published": "2020-03-30T19:45:00", "type": "osv", "title": "PYSEC-2020-340", "bulletinFamily": "software", "cvss2": {}, "cvelist": ["CVE-2020-6817"], "modified": "2022-01-05T02:16:12", "id": "OSV:PYSEC-2020-340", "href": "https://osv.dev/vulnerability/PYSEC-2020-340", "cvss": {"score": 0.0, "vector": "NONE"}}, {"lastseen": "2022-08-05T05:19:03", "description": "\nA vulnerability was discovered in python-bleach, a whitelist-based\nHTML-sanitizing library. Calls to bleach.clean with an allowed tag with\nan allowed style attribute are vulnerable to a regular expression denial\nof service (ReDoS).\n\n\nFor Debian 8 Jessie, this problem has been fixed in version\n1.4-1+deb8u1.\n\n\nWe recommend that you upgrade your python-bleach packages.\n\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: <https://wiki.debian.org/LTS>\n\n\n", "cvss3": {}, "published": "2020-04-01T00:00:00", "type": "osv", "title": "python-bleach - security update", "bulletinFamily": "software", "cvss2": {}, "cvelist": ["CVE-2020-6817"], "modified": "2022-08-05T05:18:44", "id": "OSV:DLA-2167-1", "href": "https://osv.dev/vulnerability/DLA-2167-1", "cvss": {"score": 0.0, "vector": "NONE"}}], "ubuntucve": [{"lastseen": "2023-06-07T13:57:32", "description": "In Mozilla Bleach before 3.11, a mutation XSS affects users calling\nbleach.clean with noscript and a raw tag in the allowed/whitelisted tags\noption.\n\n#### Bugs\n\n * <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=951907>\n", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2020-03-24T00:00:00", "type": "ubuntucve", "title": "CVE-2020-6802", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802"], "modified": "2020-03-24T00:00:00", "id": "UB:CVE-2020-6802", "href": "https://ubuntu.com/security/CVE-2020-6802", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-06-29T13:19:04", "description": "bleach.clean behavior parsing style attributes could result in a regular\nexpression denial of service (ReDoS). Calls to bleach.clean with an allowed\ntag with an allowed style attribute are vulnerable to ReDoS. For example,\nbleach.clean(..., attributes={'a': ['style']}).\n\n#### Bugs\n\n * <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=955388>\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2023-02-16T00:00:00", "type": "ubuntucve", "title": "CVE-2020-6817", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6817"], "modified": "2023-02-16T00:00:00", "id": "UB:CVE-2020-6817", "href": "https://ubuntu.com/security/CVE-2020-6817", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "alpinelinux": [{"lastseen": "2023-06-06T15:35:11", "description": "In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean with noscript and a raw tag in the allowed/whitelisted tags option.", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2020-03-24T22:15:00", "type": "alpinelinux", "title": "CVE-2020-6802", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802"], "modified": "2022-10-06T20:16:00", "id": "ALPINE:CVE-2020-6802", "href": "https://security.alpinelinux.org/vuln/CVE-2020-6802", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}], "mageia": [{"lastseen": "2023-06-06T16:28:09", "description": "The updated packages fix a security vulnerability: Mutation XSS in bleach.clean when noscript and raw tag whitelisted. (CVE-2020-6802) \n", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2020-03-06T16:13:58", "type": "mageia", "title": "Updated python-bleach packages fix security vulnerability\n", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802"], "modified": "2020-03-06T16:13:58", "id": "MGASA-2020-0125", "href": "https://advisories.mageia.org/MGASA-2020-0125.html", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-06-06T16:28:09", "description": "In Mozilla Bleach before 3.12, a mutation XSS in bleach.clean when RCDATA and either svg or math tags are whitelisted and the keyword argument strip=False. (CVE-2020-6816) Regular expression denial of service. (CVE-2020-6817) \n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-20T14:02:32", "type": "mageia", "title": "Updated python-bleach packages fix security vulnerability\n", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6816", "CVE-2020-6817"], "modified": "2020-04-20T14:02:32", "id": "MGASA-2020-0176", "href": "https://advisories.mageia.org/MGASA-2020-0176.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "github": [{"lastseen": "2023-06-06T15:20:36", "description": "### Impact\n\nA [mutation XSS](https://cure53.de/fp170.pdf) affects users calling `bleach.clean` with `noscript` and a raw tag (see below) in the allowed/whitelisted tags option.\n\n### Patches\n\nv3.1.1\n\n### Workarounds\n\n* modify `bleach.clean` calls to not whitelist `noscript` and one or more of the following raw tags:\n\n```\ntitle\ntextarea\nscript\nstyle\nnoembed\nnoframes\niframe\nxmp\n```\n\n* A strong [Content-Security-Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP) without `unsafe-inline` and `unsafe-eval` [`script-src`s](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src)) will also help mitigate the risk.\n\n### References\n\n* https://bugzilla.mozilla.org/show_bug.cgi?id=1615315\n* https://cure53.de/fp170.pdf\n* https://nvd.nist.gov/vuln/detail/CVE-2020-6802\n* https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleach\n\n### Credits\n\n* Reported by [Yaniv Nizry](https://twitter.com/ynizry) from the CxSCA AppSec group at Checkmarx\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue at [https://github.com/mozilla/bleach/issues](https://github.com/mozilla/bleach/issues)\n* Email us at [security@mozilla.org](mailto:security@mozilla.org)\n", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2020-02-24T17:33:44", "type": "github", "title": "XSS in Bleach when noscript and raw tag whitelisted", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802"], "modified": "2023-01-28T05:05:15", "id": "GHSA-Q65M-PV3F-WR5R", "href": "https://github.com/advisories/GHSA-q65m-pv3f-wr5r", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-06-06T15:20:35", "description": "### Impact\n\n`bleach.clean` behavior parsing style attributes could result in a regular expression denial of service (ReDoS).\n\nCalls to ``bleach.clean`` with an allowed tag with an allowed ``style`` attribute are vulnerable to ReDoS. For example, ``bleach.clean(..., attributes={'a': ['style']})``.\n\n### Patches\n\n3.1.4\n\n### Workarounds\n\n* do not whitelist the style attribute in `bleach.clean` calls\n\n* limit input string length\n\n### References\n\n* https://bugzilla.mozilla.org/show_bug.cgi?id=1623633\n* https://www.regular-expressions.info/redos.html\n* https://blog.r2c.dev/posts/finding-python-redos-bugs-at-scale-using-dlint-and-r2c/\n* https://vulners.com/cve/CVE-2020-6817\n\n### Credits\n\n* Reported by schwag09 of r2c\n\n### For more information\nIf you have any questions or comments about this advisory:\n\n* Open an issue at https://github.com/mozilla/bleach/issues\n* Email us at security@mozilla.org", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-03-30T19:45:56", "type": "github", "title": "regular expression denial-of-service (ReDoS) in Bleach", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6817"], "modified": "2023-02-28T16:48:26", "id": "GHSA-VQHP-CXGC-6WMM", "href": "https://github.com/advisories/GHSA-vqhp-cxgc-6wmm", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "debian": [{"lastseen": "2023-06-26T14:55:17", "description": "- -------------------------------------------------------------------------\nDebian Security Advisory DSA-4636-1 security@debian.org\nhttps://www.debian.org/security/ Salvatore Bonaccorso\nFebruary 28, 2020 https://www.debian.org/security/faq\n- -------------------------------------------------------------------------\n\nPackage : python-bleach\nCVE ID : CVE-2020-6802\nDebian Bug : 951907\n\nIt was reported that python-bleach, a whitelist-based HTML-sanitizing\nlibrary, is prone to a mutation XSS vulnerability in bleach.clean when\n'noscript' and one or more raw text tags were whitelisted.\n\nFor the stable distribution (buster), this problem has been fixed in\nversion 3.1.1-0+deb10u1.\n\nWe recommend that you upgrade your python-bleach packages.\n\nFor the detailed security status of python-bleach please refer to its\nsecurity tracker page at:\nhttps://security-tracker.debian.org/tracker/python-bleach\n\nFurther information about Debian Security Advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://www.debian.org/security/\n\nMailing list: debian-security-announce@lists.debian.org", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2020-02-28T21:07:06", "type": "debian", "title": "[SECURITY] [DSA 4636-1] python-bleach security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802"], "modified": "2020-02-28T21:07:06", "id": "DEBIAN:DSA-4636-1:9195A", "href": "https://lists.debian.org/debian-security-announce/2020/msg00039.html", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-03-05T21:22:53", "description": "Package : python-bleach\nVersion : 1.4-1+deb8u1\nCVE ID : CVE-2020-6817\nDebian Bug : 955388\n\n\nA vulnerability was discovered in python-bleach, a whitelist-based\nHTML-sanitizing library. Calls to bleach.clean with an allowed tag with\nan allowed style attribute are vulnerable to a regular expression denial\nof service (ReDoS).\n\nFor Debian 8 "Jessie", this problem has been fixed in version\n1.4-1+deb8u1.\n\nWe recommend that you upgrade your python-bleach packages.\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://wiki.debian.org/LTS\nAttachment:\nsignature.asc\nDescription: PGP signature\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-01T17:53:31", "type": "debian", "title": "[SECURITY] [DLA 2167-1] python-bleach security update", "bulletinFamily": "unix", "cvss2": {}, "cvelist": ["CVE-2020-6817"], "modified": "2020-04-01T17:53:31", "id": "DEBIAN:DLA-2167-1:21AF1", "href": "https://lists.debian.org/debian-lts-announce/2020/04/msg00001.html", "cvss": {"score": 0.0, "vector": "NONE"}}, {"lastseen": "2021-10-22T02:36:29", "description": "- -------------------------------------------------------------------------\nDebian Security Advisory DSA-4636-1 security@debian.org\nhttps://www.debian.org/security/ Salvatore Bonaccorso\nFebruary 28, 2020 https://www.debian.org/security/faq\n- -------------------------------------------------------------------------\n\nPackage : python-bleach\nCVE ID : CVE-2020-6802\nDebian Bug : 951907\n\nIt was reported that python-bleach, a whitelist-based HTML-sanitizing\nlibrary, is prone to a mutation XSS vulnerability in bleach.clean when\n'noscript' and one or more raw text tags were whitelisted.\n\nFor the stable distribution (buster), this problem has been fixed in\nversion 3.1.1-0+deb10u1.\n\nWe recommend that you upgrade your python-bleach packages.\n\nFor the detailed security status of python-bleach please refer to its\nsecurity tracker page at:\nhttps://security-tracker.debian.org/tracker/python-bleach\n\nFurther information about Debian Security Advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://www.debian.org/security/\n\nMailing list: debian-security-announce@lists.debian.org", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "baseScore": 6.1, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "userInteraction": "REQUIRED", "version": "3.1"}, "impactScore": 2.7}, "published": "2020-02-28T21:07:06", "type": "debian", "title": "[SECURITY] [DSA 4636-1] python-bleach security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802"], "modified": "2020-02-28T21:07:06", "id": "DEBIAN:DSA-4636-1:B54AA", "href": "https://lists.debian.org/debian-security-announce/2020/msg00039.html", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}], "cve": [{"lastseen": "2023-06-06T15:00:05", "description": "bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to bleach.clean with an allowed tag with an allowed style attribute are vulnerable to ReDoS. For example, bleach.clean(..., attributes={'a': ['style']}).", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2023-02-16T22:15:00", "type": "cve", "title": "CVE-2020-6817", "cwe": ["CWE-1333"], "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6817"], "modified": "2023-02-28T14:46:00", "cpe": [], "id": "CVE-2020-6817", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-6817", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}, "cpe23": []}, {"lastseen": "2023-06-06T15:00:02", "description": "In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean with noscript and a raw tag in the allowed/whitelisted tags option.", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2020-03-24T22:15:00", "type": "cve", "title": "CVE-2020-6802", "cwe": ["CWE-79"], "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802"], "modified": "2022-10-06T20:16:00", "cpe": ["cpe:/o:fedoraproject:fedora:30", "cpe:/o:fedoraproject:fedora:31", "cpe:/o:fedoraproject:fedora:32"], "id": "CVE-2020-6802", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-6802", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}, "cpe23": ["cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*", "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*", "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*"]}], "debiancve": [{"lastseen": "2023-06-06T15:00:36", "description": "In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean with noscript and a raw tag in the allowed/whitelisted tags option.", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2020-03-24T22:15:00", "type": "debiancve", "title": "CVE-2020-6802", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802"], "modified": "2020-03-24T22:15:00", "id": "DEBIANCVE:CVE-2020-6802", "href": "https://security-tracker.debian.org/tracker/CVE-2020-6802", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-06-06T15:00:36", "description": "bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to bleach.clean with an allowed tag with an allowed style attribute are vulnerable to ReDoS. For example, bleach.clean(..., attributes={'a': ['style']}).", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2023-02-16T22:15:00", "type": "debiancve", "title": "CVE-2020-6817", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6817"], "modified": "2023-02-16T22:15:00", "id": "DEBIANCVE:CVE-2020-6817", "href": "https://security-tracker.debian.org/tracker/CVE-2020-6817", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "veracode": [{"lastseen": "2023-04-18T12:49:55", "description": "bleach is vulnerable to cross-site scripting (XSS). Invocation of `bleach.clean` method with a scripting parameter set to `FALSE` and a raw tags (such as title, textarea, script, style, noembed, noframes, iframe, xmp) allows BleachHTMLParser to process user-contributed content using innerHTML property, allowing the browsers to mutate a harmless content to malicious XSS string and execute on rendering of the new DOM element. It affects all three major browsers such as IE, Firefox, and Chrome.\n", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2020-02-25T05:39:17", "type": "veracode", "title": "Cross-Site Scripting (XSS)", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802"], "modified": "2022-10-06T22:27:04", "id": "VERACODE:22570", "href": "https://sca.analysiscenter.veracode.com/vulnerability-database/security/1/1/sid-22570/summary", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}, {"lastseen": "2023-04-18T12:36:11", "description": "bleach is vulnerable to regular expression denial of service (ReDoS). The vulnerability exists when parsing style attributes through `sanitize_css`.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-03-31T06:36:51", "type": "veracode", "title": "Regular Expression Denial-of-Service (ReDoS)", "bulletinFamily": "software", "cvss2": {}, "cvelist": ["CVE-2020-6817"], "modified": "2023-02-28T15:53:21", "id": "VERACODE:22839", "href": "https://sca.analysiscenter.veracode.com/vulnerability-database/security/1/1/sid-22839/summary", "cvss": {"score": 0.0, "vector": "NONE"}}], "freebsd": [{"lastseen": "2023-06-06T15:28:27", "description": "\n\nBleach developers reports:\n\nbleach.clean behavior parsing style attributes could result in a\n\t regular expression denial of service (ReDoS).\nCalls to bleach.clean with an allowed tag with an allowed style\n\t attribute are vulnerable to ReDoS. For example, bleach.clean(...,\n\t attributes={'a': ['style']}).\n\n\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2019-03-09T00:00:00", "type": "freebsd", "title": "py-bleach -- regular expression denial-of-service", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6817"], "modified": "2019-03-09T00:00:00", "id": "4C52EC3C-86F3-11EA-B5B4-641C67A117D8", "href": "https://vuxml.freebsd.org/freebsd/4c52ec3c-86f3-11ea-b5b4-641c67a117d8.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "redhatcve": [{"lastseen": "2022-05-21T01:11:32", "description": "No description is available for this CVE.\n", "cvss3": {}, "published": "2022-05-21T00:05:30", "type": "redhatcve", "title": "CVE-2020-6817", "bulletinFamily": "info", "cvss2": {}, "cvelist": ["CVE-2020-6817"], "modified": "2022-05-21T00:05:30", "id": "RH:CVE-2020-6817", "href": "https://access.redhat.com/security/cve/cve-2020-6817", "cvss": {"score": 0.0, "vector": "NONE"}}], "ibm": [{"lastseen": "2023-02-27T21:55:38", "description": "## Summary\n\nMultiple vulnerabilities have been found in the Bleach package, which is either built in to or distributed with IBM WMLCE.\n\n## Vulnerability Details\n\n** CVEID: **[CVE-2020-6816](<https://vulners.com/cve/CVE-2020-6816>) \n** DESCRIPTION: **Mozilla Bleach is vulnerable to cross-site scripting, caused by improper validation of user-supplied input by the bleach.clean. A remote attacker could exploit this vulnerability using the svg or math in the allowed/allowlisted tags to inject malicious script into a Web page which would be executed in a victim's Web browser within the security context of the hosting Web site, once the page is viewed. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials. \nCVSS Base score: 6.1 \nCVSS Temporal Score: See: [ https://exchange.xforce.ibmcloud.com/vulnerabilities/178671](<https://exchange.xforce.ibmcloud.com/vulnerabilities/178671>) for the current score. \nCVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N) \n \n** CVEID: **[CVE-2020-6802](<https://vulners.com/cve/CVE-2020-6802>) \n** DESCRIPTION: **Mozilla Bleach is vulnerable to cross-site scripting, caused by improper validation of user-supplied input by the bleach.clean A remote attacker could exploit this vulnerability using a raw tag in the allowed/allowlisted tags option to inject malicious script into a Web page which would be executed in a victim's Web browser within the security context of the hosting Web site, once the page is viewed. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials. \nCVSS Base score: 6.1 \nCVSS Temporal Score: See: [ https://exchange.xforce.ibmcloud.com/vulnerabilities/178672](<https://exchange.xforce.ibmcloud.com/vulnerabilities/178672>) for the current score. \nCVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)\n\n## Affected Products and Versions\n\nAffected Product(s)| Version(s) \n---|--- \nIBM WML Community Edition| 1.6.2 \nIBM WML Community Edition| 1.7.0 \n \n\n\n## Remediation/Fixes\n\nAll IBM WMLCE distribution channels have been updated. For those using containers, pulling the image again from its upstream container registry (<https://hub.docker.com/r/ibmcom/powerai>, <https://catalog.redhat.com>, etc) will download an updated image with CVEs resolved. All others should update directly from our conda channel via `conda update`.\n\n## Workarounds and Mitigations\n\nNone\n\n## ", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2020-05-19T17:00:30", "type": "ibm", "title": "Security Bulletin: A security vulnerability has been identified in Bleach shipped with IBM Watson Machine Learning Community Edition (WMLCE)", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-6802", "CVE-2020-6816"], "modified": "2020-05-19T17:00:30", "id": "5E9C6DD0800029B740BCACC7CC27F74E137E69E9A07B1C9DDF3C4712DB20997E", "href": "https://www.ibm.com/support/pages/node/6211861", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}]}
[SECURITY] Fedora 32 Update: python-bleach-3.1.4-2.fc32
