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cvelistGitHub_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

14.0%

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"
      }
    ]
  }
]

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

14.0%

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