Bug 2436128 (CVE-2025-61637)

Summary: CVE-2025-61637 MediaWiki: MediaWiki: Cross-site Scripting via improper input neutralization
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in MediaWiki. A remote attacker with high privileges could exploit an Improper Neutralization of Input During Web Page Generation (Cross-site Scripting or XSS) vulnerability. This flaw allows the injection of malicious scripts into web pages, which can lead to information disclosure or session hijacking.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2436194, 2436200    
Bug Blocks:    

Description OSIDB Bzimport 2026-02-03 00:03:03 UTC
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.Action/mediawiki.Action.Edit.Preview.Js, resources/src/mediawiki.Page.Preview.Js.

This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1.