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Medium · 6.1 CVE-2026-100238 EUVD-2026-89033GHSA-hg46-8gx2-qp79

Flow colon-separator and flow-guidedtour-optin-welcome-description messages allow stored XSS

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 - Flow Extension allows Stored XSS.

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

Affected products

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

References