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Medium · 6.1 CVE-2026-100245 EUVD-2026-89092GHSA-2rcm-h6cw-xrfr

Stored XSS on Wikibase Special:SetSiteLink via unescaped system message

Published Sep 29, 2026 · Updated Sep 30, 2026 · Assigned by wikimedia-foundation

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - Wikibase Extension allows Stored XSS.

This issue affects Mediawiki - Wikibase Extension: from * before 1.46.1, 1.45.5, 1.43.10.

Affected products

VendorProductAffectedFixed
Wikimedia Foundation Mediawiki - Wikibase Extension < 1.46.1, 1.45.5, 1.43.10 1.46.1, 1.45.5, 1.43.10

References