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Critical · 10.0 CVE-2025-12004 EUVD-2025-35148GHSA-42p2-jfjf-9m59

The compare API module breaks Extension:Lockdown

Published Oct 21, 2025 · Updated Oct 21, 2025 · Assigned by wikimedia-foundation

Description

Incorrect Permission Assignment for Critical Resource vulnerability in The Wikimedia Foundation Mediawiki - Lockdown Extension allows Privilege Abuse. Fixed in Mediawiki Core Action APIThis issue affects Mediawiki - Lockdown Extension: from master before 1.42.

Affected products

VendorProductAffectedFixed
The Wikimedia Foundation Mediawiki - Lockdown Extension master – < 1.42 1.42

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Ubuntu 26.10 mediawiki No fix yet —
Ubuntu 26.04 LTS mediawiki No fix yet —
Ubuntu 25.10 mediawiki No fix yet —
Ubuntu 18.04 LTS mediawiki No fix yet —
Show 3 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 24.04 LTS mediawiki No fix yet —
Ubuntu Pro 22.04 LTS mediawiki No fix yet —
Ubuntu Pro 20.04 LTS mediawiki No fix yet —

Advisories 1

References