# CVE-2025-11261: mediawiki: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedi...

CVE-2025-11261 is fixed in mediawiki on 1 platform, first by DEBIAN-CVE-2025-11261, released February 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-11261
- Priority: Routine
- CVSS: 6.1 (medium)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 3, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | mediawiki Debian 12.15 (bookworm) | 1:1.39.17-1~deb12u1 | [DEBIAN-CVE-2025-11261](https://patchblox.com/security/data/fix/linux/debian-cve-2025-11261.md) | Feb 3, 2026 |
| Linux | mediawiki Debian 13.5 (trixie) | 1:1.43.6+dfsg-1~deb13u1 | [DEBIAN-CVE-2025-11261](https://patchblox.com/security/data/fix/linux/debian-cve-2025-11261.md) | Feb 3, 2026 |
| Linux | mediawiki Debian 14 | 1:1.43.5+dfsg-1 | [DEBIAN-CVE-2025-11261](https://patchblox.com/security/data/fix/linux/debian-cve-2025-11261.md) | Feb 3, 2026 |

---

Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.