CVE-2025-6926 Security Authentication Bypass in CentralAuth
Attackers can bypass authentication in the MediaWiki CentralAuth Extension, potentially gaining unauthorized access to user accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-6926?
CVE-2025-6926 is a high-severity authentication bypass vulnerability in Wikimedia Foundation Mediawiki - CentralAuth Extension, published on 3 Jul 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper Authentication vulnerability in Wikimedia Foundation Mediawiki - CentralAuth Extension allows : Bypass Authentication.This issue affects Mediawiki - CentralAuth Extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.
Weakness: CWE-287
Which versions are affected by CVE-2025-6926?
How do I fix CVE-2025-6926?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-6926 being exploited?
There is no known exploitation of CVE-2025-6926 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-6926, GHSA-r9mp-767w-88m3, UBUNTU-CVE-2025-6926.