Description
An issue was discovered in MediaWiki before 1.35.14, 1.36.x through 1.39.x before 1.39.6, and 1.40.x before 1.40.2. In includes/logging/RightsLogFormatter.php, group-*-member messages can result in XSS on Special:log/rights.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mediawiki | 1:1.39.6-1 | — |
| Debian 13 | mediawiki | 1:1.39.6-1 | — |
| Debian 12 | mediawiki | 1:1.39.7-1~deb12u1 | — |
| Debian 11 | mediawiki | 1:1.35.13-1+deb11u3 | DLA-3896-1 |
| Debian 10 | mediawiki | 1:1.31.16-1+deb10u8 | DLA-3796-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | mediawiki | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | mediawiki | No fix yet | — |
| Ubuntu Pro 20.04 LTS | mediawiki | No fix yet | — |
Advisories 3
- DLA-3796-1 mediawiki - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3896-1 mediawiki - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2023-3208 MediaWiki: Schwachstelle ermöglicht Cross-Site Scripting BSI CERT-Bund (WID) · Sep 26, 2024