What’s Vulnerable › Vulnerabilities

CVE-2023-51704

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-12-22 · updated 2026-06-17
• Weakness: CWE-79

Description

An issue was discovered in MediaWiki before 1.35.14, 1.36.x through 1.39.x before 1.39.6, and 1.40.x before 1.40.2. In includes/logging/RightsLogFormatter.php, group-*-member messages can result in XSS on Special:log/rights.

Affected products

• Wikimedia Foundation MediaWiki: before 1.35.14; from 1.36.0 before 1.39.6; from 1.40.0 before 1.40.2 — fixed in 1.35.14, 1.39.6, 1.40.2

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.35.14, 1.39.6, 1.40.2. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2024/04/msg00018.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
• https://phabricator.wikimedia.org/T347726
• https://lists.debian.org/debian-lts-announce/2024/04/msg00018.html
• https://lists.debian.org/debian-lts-announce/2024/09/msg00039.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
• https://phabricator.wikimedia.org/T347726

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