Bug 2543742 (CVE-2026-103047)

Summary: CVE-2026-103047 CentralAuth: MediaWiki: CentralAuth: Stored Cross-Site Scripting via internationalization messages
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
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Hardware: All   
OS: Linux   
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A flaw was found in the MediaWiki CentralAuth extension. Improper neutralization of input in internationalization (i18n) messages allows a remote attacker to conduct stored Cross-Site Scripting (XSS) attacks. If exploited, malicious scripts execute within an unsuspecting user's browser session, potentially leading to unauthorized actions or sensitive data disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2543792    
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Description OSIDB Bzimport 2026-09-29 23:14:14 UTC
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth extension allows Stored XSS.

This issue affects Mediawiki - CentralAuth extension: before 1.46.1, 1.45.5, 1.43.10.