CVE-2024-34502: WikibaseLexeme · Cross-Site Request Forgery
Source GCVE Database
Not known to be exploited · CVSS 9.8 Critical · fixed in 1.41.1 : patch WikibaseLexeme as a priority.
Data as of 3 Nov 2026, 17:20 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 9.8 |
|---|
- Patch
- Available – fixed in 1.41.1, 1.40.2, 1.39.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 5 May 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.
What to do
Upgrade wikimedia/extensions/WikibaseLexeme to 1.41.1, 1.40.2 or 1.39.6.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
GitHubwikimedia/extensions/WikibaseLexemepkg:github/wikimedia/extensions/WikibaseLexemeOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available in MediaWiki versions 1.39.6, 1.40.2, and 1.41.1 and later. Users should upgrade to these versions or later to remediate the vulnerability. No other mitigation or workaround is indicated in the provided data.
Description
A critical vulnerability (CVE-2024-34502) exists in the WikibaseLexeme extension of MediaWiki versions before 1.39.6, 1.40.x before 1.40.2, and 1.41.x before 1.41.1. The flaw allows the Special:MergeLexemes page to perform a merge edit without requiring a POST request or a valid edit token, enabling unauthorized edits.
References
- nvd.nist.gov/vuln/detail/CVE-2024-34502 (opens in a new tab)
- gerrit.wikimedia.org/r/c/mediawiki/extensions/WikibaseLexeme/+/1013359 (opens in a new tab)
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY (opens in a new tab)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY (opens in a new tab)
- phabricator.wikimedia.org/T357101 (opens in a new tab)