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GitHub_MCVELIST:CVE-2023-43659

HistoryOct 16, 2023 - 9:05 p.m.

CVE-2023-43659 Cross-site Scripting via email preview when CSP disabled in Discourse

2023-10-1621:05:31

CWE-79

GitHub_M

www.cve.org

discourse

cross-site scripting

email preview

csp

patch

upgrade

8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

0.0004 Low

EPSS

Percentile

14.1%

JSON

Discourse is an open source platform for community discussion. Improper escaping of user input allowed for Cross-site Scripting attacks via the digest email preview UI. This issue only affects sites with CSP disabled. This issue has been patched in the 3.1.1 stable release as well as the 3.2.0.beta1 release. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum.

CNA Affected

[
  {
    "vendor": "discourse",
    "product": "discourse",
    "versions": [
      {
        "version": "stable <= 3.1.1",
        "status": "affected"
      },
      {
        "version": "beta <= 3.2.0.beta1",
        "status": "affected"
      }
    ]
  }
]

References

developer.mozilla.org/en-US/docs/Web/HTTP/CSP

github.com/discourse/discourse/security/advisories/GHSA-g4qg-5q2h-m8ph

8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

0.0004 Low

EPSS

Percentile

14.1%

JSON

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