CVE-2025-53478 Information

Description

The CheckUser extension’s Special:Investigate interface is vulnerable to reflected XSS due to improper escaping of certain internationalized system messages rendered on the “IPs and User agents” tab.

This issue affects Mediawiki - CheckUser extension: from 1.39.X before 1.39.13 from 1.42.X before 1.42.7 from 1.43.X before 1.43.2.

Reference

https://gerrit.wikimedia.org/r/q/I3a1e21b6800ff4d813a33ee9fe9b7ccf070b6b2e https://phabricator.wikimedia.org/T394692

CNNVD-202507-767 (Published: 2025-07-07)

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