CVE-2025-67481 mw.message(…).parse() doesn't output safe HTML, but it's being used as if it does

None 0.0 Published 3 Feb 2026 Updated 3 Feb 2026

Attackers can inject malicious scripts via MediaWiki's message parsing, potentially executing code or bypassing security controls.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2025-67481?

CVE-2025-67481 is a cross-site scripting vulnerability in Mediawiki Mediawiki, published on 3 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.JqueryMsg/mediawiki.JqueryMsg.Js.

This issue affects MediaWiki: from * before 1.39.16, 1.43.6, 1.44.3, 1.45.1.

Weakness: CWE-79

Which versions are affected by CVE-2025-67481?

It affects 1 product.

Products include Mediawiki Mediawiki.

How do I fix CVE-2025-67481?

Upgrade to a fixed version.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-67481 being exploited?

There is no known exploitation of CVE-2025-67481 in the wild and no public exploit code.

All Mediawiki Mediawiki vulnerabilities

Sources

Also known as DEBIAN-CVE-2025-67481, GHSA-6898-66v9-cm3x, UBUNTU-CVE-2025-67481.