CVE-2025-67475 Stored XSS through edit summaries in MW Core

None 0.0 Published 3 Feb 2026 Updated 3 Feb 2026

Attackers can inject malicious scripts via edit summaries in MediaWiki, potentially leading to session hijacking or code execution.

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

What is CVE-2025-67475?

CVE-2025-67475 is a cross-site scripting vulnerability in Mediawiki Mediawiki, published on 3 Feb 2026. An attacker can exploit it over the internet without logging in, 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 includes/CommentFormatter/CommentParser.Php.

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-2025-67475?

It affects 1 product.

Products include Mediawiki Mediawiki.

How do I fix CVE-2025-67475?

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-2025-67475 being exploited?

There is no known exploitation of CVE-2025-67475 in the wild and no public exploit code.

All Mediawiki Mediawiki vulnerabilities

Sources

Also known as DEBIAN-CVE-2025-67475, GHSA-2pvg-g56g-vcf2, UBUNTU-CVE-2025-67475.