What’s Vulnerable › Vulnerabilities

CVE-2022-34912

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-07-02 · updated 2026-06-17

Description

An issue was discovered in MediaWiki before 1.37.3 and 1.38.x before 1.38.1. The contributions-title, used on Special:Contributions, is used as page title without escaping. Hence, in a non-default configuration where a username contains HTML entities, it won't be escaped.

Affected products

• Fedoraproject Fedora: 36, 37
• Wikimedia Foundation MediaWiki: before 1.37.3; 1.38.0, 1.38.0-rc0, 1.38.0-rc1 — fixed in 1.37.3

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.37.3. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2022/09/msg00027.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7N5ZBWLNNPZKFK7Q4KEHGCJ2YELQEUJP/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DKKOQXPYLMBSEVDHFS32BPBR3ZQJKY5B/
• https://phabricator.wikimedia.org/T308473
• https://security.gentoo.org/glsa/202305-24
• https://www.debian.org/security/2022/dsa-5246
• https://lists.debian.org/debian-lts-announce/2022/09/msg00027.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7N5ZBWLNNPZKFK7Q4KEHGCJ2YELQEUJP/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DKKOQXPYLMBSEVDHFS32BPBR3ZQJKY5B/
• https://phabricator.wikimedia.org/T308473
• https://security.gentoo.org/glsa/202305-24
• https://www.debian.org/security/2022/dsa-5246

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