Description
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki.
This vulnerability is associated with program files includes/Skin/Skin.Php.
This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Wikimedia Foundation | MediaWiki | < 1.43.7, 1.44.4, 1.45.2 | 1.43.7, 1.44.4, 1.45.2 |
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 | 1:1.43.8+dfsg-1 | — |
| Debian 13 | mediawiki | 1:1.43.8+dfsg-1~deb13u1 | — |
| Debian 12 | mediawiki | 1:1.39.17-1+deb12u2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | mediawiki | 1:1.43.8+dfsg-2 | — |
| Ubuntu 26.04 LTS | mediawiki | 1:1.43.8+dfsg-2 | — |
| Ubuntu 25.10 | mediawiki | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | mediawiki | 1:1.39.7-1ubuntu0.1~esm1 | USN-8315-1 |
| Ubuntu Pro 22.04 LTS | mediawiki | 1:1.35.6-1ubuntu0.1~esm1 | USN-8315-1 |
| Ubuntu Pro 20.04 LTS | mediawiki | 1:1.31.7-1ubuntu0.1~esm1 | USN-8315-1 |
Advisories 2
- WID-SEC-2026-0946 MediaWiki: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 21, 2026
- USN-8315-1 mediawiki vulnerabilities Ubuntu Security Notices (USN) · May 27, 2026