CVE catalog

CVE-2025-11261

mediawiki: CVE-2025-11261

Severity: Medium · CVSS 4.6CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Published: Jan 1, 2025, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.26% · Oct 25, 2026

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Language/mediawiki.Language.Js. This issue affects MediaWiki: from * before 1.39.15, 1.43.5, 1.44.2.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	mediawiki	sid	`1:1.43.11+dfsg-3`	fixed
Debian	mediawiki	forky	`1:1.43.11+dfsg-1`	fixed
Debian	mediawiki	trixie	`1:1.43.9+dfsg-1~deb13u1`	fixed
Debian	mediawiki	trixie-security	`1:1.43.9+dfsg-1~deb13u1`	fixed
Debian	mediawiki	bookworm	`1:1.39.17-1+deb12u2`	fixed
Debian	mediawiki	bookworm-security	`1:1.39.17-1+deb12u2`	fixed
Ubuntu	mediawiki	18.04	`1:1.27.3-1`	vulnerable
Ubuntu	mediawiki	18.04	`1:1.27.4-1`	vulnerable
Ubuntu	mediawiki	18.04	`1:1.27.4-2`	vulnerable
Ubuntu	mediawiki	18.04	`1:1.27.4-3`	vulnerable
Ubuntu	mediawiki	pro	`1:1.39.4-2`	vulnerable
Ubuntu	mediawiki	pro	`1:1.39.5-1`	vulnerable
Ubuntu	mediawiki	pro	`1:1.39.6-1`	vulnerable
Ubuntu	mediawiki	pro	`1:1.39.7-1`	vulnerable
Ubuntu	mediawiki	pro	`1:1.39.7-1ubuntu0.1~esm1`	vulnerable
Ubuntu	mediawiki	25.10	`1:1.43.1+dfsg-1`	vulnerable
Ubuntu	mediawiki	25.10	`1:1.43.1+dfsg-2`	vulnerable
Ubuntu	mediawiki	25.10	`1:1.43.3+dfsg-1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	mediawiki	source	sid	`1:1.43.5+dfsg-1`	not yet assigned	Not reported	Not reported
Debian	mediawiki	source	forky	`1:1.43.5+dfsg-1`	not yet assigned	Not reported	Not reported
Debian	mediawiki	source	trixie	`1:1.43.6+dfsg-1~deb13u1`	not yet assigned	Not reported	Not reported
Debian	mediawiki	source	bookworm	`1:1.39.17-1~deb12u1`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[mediawiki]Fixed
Details (4)
- 1:1.39.17-1+deb12u2 · all · bookworm
  Fixed · Fixed: 1:1.39.17-1~deb12u1
  dsa · mediawiki · debian · bookworm; dsa · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm
  Fixed · Fixed: 1:1.39.17-1~deb12u1
  dsa · mediawiki · debian · bookworm; dsa · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm-security
  Fixed · Fixed: 1:1.39.17-1~deb12u1
  dsa · mediawiki · debian · bookworm; dsa · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm-security
  Fixed · Fixed: 1:1.39.17-1~deb12u1
  dsa · mediawiki · debian · bookworm; dsa · mediawiki · debian · 12
[mediawiki-classes]Fixed
Source package: [mediawiki]
Details (4)
- 1:1.39.17-1+deb12u2 · all · bookworm
  Fixed · Fixed: 1:1.39.17-1~deb12u1
  dsa · mediawiki · debian · bookworm; dsa · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm
  Fixed · Fixed: 1:1.39.17-1~deb12u1
  dsa · mediawiki · debian · bookworm; dsa · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm-security
  Fixed · Fixed: 1:1.39.17-1~deb12u1
  dsa · mediawiki · debian · bookworm; dsa · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm-security
  Fixed · Fixed: 1:1.39.17-1~deb12u1
  dsa · mediawiki · debian · bookworm; dsa · mediawiki · debian · 12

[Debian 13 (Trixie)]

[mediawiki]Fixed
Details (4)
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie
  Fixed · Fixed: 1:1.43.6+dfsg-1~deb13u1
  dsa · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie
  Fixed · Fixed: 1:1.43.6+dfsg-1~deb13u1
  dsa · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie-security
  Fixed · Fixed: 1:1.43.6+dfsg-1~deb13u1
  dsa · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie-security
  Fixed · Fixed: 1:1.43.6+dfsg-1~deb13u1
  dsa · mediawiki · debian · 13
[mediawiki-classes]Fixed
Source package: [mediawiki]
Details (4)
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie
  Fixed · Fixed: 1:1.43.6+dfsg-1~deb13u1
  dsa · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie
  Fixed · Fixed: 1:1.43.6+dfsg-1~deb13u1
  dsa · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie-security
  Fixed · Fixed: 1:1.43.6+dfsg-1~deb13u1
  dsa · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie-security
  Fixed · Fixed: 1:1.43.6+dfsg-1~deb13u1
  dsa · mediawiki · debian · 13

Observed: Oct 27, 2026, 11:33:32 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]