CVE-2025-61641 API list=allpages with maxsize is making really slow queries
Attackers can cause denial of service in MediaWiki by triggering slow queries via the allpages API with maxsize parameter.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-61641?
CVE-2025-61641 is a low-severity denial of service vulnerability in Mediawiki Mediawiki, published on 2 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. This vulnerability is associated with program files includes/api/ApiQueryAllPages.Php.
This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1.
Weakness: CWE-22
Which versions are affected by CVE-2025-61641?
It affects 1 product.
Products include Mediawiki Mediawiki.
How do I fix CVE-2025-61641?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-61641 being exploited?
There is no known exploitation of CVE-2025-61641 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as DEBIAN-CVE-2025-61641, GHSA-qmgg-3m8p-p8cc, UBUNTU-CVE-2025-61641.