CVE-2025-67479 Magic word replacement in legacy parser allows using reserved data attributes through wikitext
Attackers can inject malicious scripts via reserved data attributes in wikitext, potentially executing code or bypassing security controls in MediaWiki.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-67479?
CVE-2025-67479 is a cross-site scripting vulnerability in Wikimedia Foundation Cite, published on 3 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Vulnerability in Wikimedia Foundation MediaWiki, Wikimedia Foundation Cite. This vulnerability is associated with program files includes/Parser/CoreParserFunctions.Php, includes/Parser/Sanitizer.Php.
This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Cite: from * before 1.39.14, 1.43.4, 1.44.1.
Which versions are affected by CVE-2025-67479?
How do I fix CVE-2025-67479?
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-2025-67479 being exploited?
There is no known exploitation of CVE-2025-67479 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-67479, GHSA-mvgm-9fcq-x877, UBUNTU-CVE-2025-67479.