Detections
Analytics
CVE-2025-53479
medium
Description
The CheckUser extension’s Special:CheckUser interface is vulnerable to reflected XSS via the rev-deleted-user message. This message is rendered without proper escaping, making it possible to inject JavaScript through the uselang=x-xss language override mechanism. This issue affects Mediawiki - CheckUser extension: from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.
References
https://phabricator.wikimedia.org/T394693
https://gerrit.wikimedia.org/r/q/I159e14543912cb3bc7f4a00c3090c0285b154786