Description
An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In Special:CheckUser, a check of the "get edits" type is vulnerable to HTML injection through the User-Agent HTTP request header.
Advisories 1
- WID-SEC-2023-1695 MediaWiki: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 13, 2026