Description
An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. Special:CheckUserLog shows usernames that have been hidden.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| MediaWiki | CheckUser | < 1.35.11, 1.36.0 – < 1.38.7, 1.39.0 – < 1.39.4 | 1.35.11 |
Advisories 1
- WID-SEC-2023-1695 MediaWiki: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 13, 2026