Improper access control in MediaWiki - CVE-2024-34502
Published: May 7, 2024
Vulnerability identifier: #VU89213
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2024-34502
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists in the WikibaseLexeme extension due to Special:MergeLexemes makes edits on GET requests without edit tokens. A remote attacker can make an edit that merges the from-id to the to-id, even if the request was not a POST request, and even if it does not contain an edit token.
Affected software
MediaWiki
How to mitigate CVE-2024-34502
Install updates from vendor's website.
MediaWiki - addressed in versions 1.39.7, 1.40.3, 1.41.1