CVE-2025-11261
Cross-Site Scripting in MediaWiki Language.js Enables Code Injection
Publication date: 2026-02-03
Last updated on: 2026-03-25
Assigner: wikimedia-foundation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mediawiki | mediawiki | to 1.39.15 (exc) |
| mediawiki | mediawiki | From 1.43.0 (inc) to 1.43.5 (exc) |
| mediawiki | mediawiki | From 1.44.0 (inc) to 1.44.2 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a Cross-site Scripting (XSS) issue in Wikimedia Foundation MediaWiki. It occurs due to improper neutralization of input during web page generation, specifically in the program files resources/src/mediawiki.Language/mediawiki.Language.Js. This means that malicious scripts can be injected into web pages, potentially executed by users viewing those pages.
How can this vulnerability impact me? :
The vulnerability can allow attackers to execute malicious scripts in the context of the affected web pages. This can lead to unauthorized actions such as stealing user credentials, session hijacking, or defacing web content, thereby compromising user security and trust.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know