CVE-2025-62670: The Wikimedia Foundation Mediawiki - Flexdiagrams Extension

Medium severity, CVSS 6.9. EPSS: 0.5% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - FlexDiagrams Extension allows Stored XSS.This issue affects Mediawiki - FlexDiagrams Extension: master.

Affected products

• The Wikimedia Foundation Mediawiki - Flexdiagrams Extension

Published 2025-10-18. Last modified 2026-10-09.