CVE-2025-62666 DoS vector through the cirrusbuilddoc query API
Attackers can cause denial of service via the CirrusSearch query API due to unthrottled resource allocation in MediaWiki.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-62666?
CVE-2025-62666 is a medium-severity denial of service vulnerability in The Wikimedia Foundation Mediawiki - CirrusSearch Extension, published on 18 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Allocation of Resources Without Limits or Throttling vulnerability in The Wikimedia Foundation Mediawiki - CirrusSearch Extension allows HTTP DoS.This issue affects Mediawiki - CirrusSearch Extension: from master before 1.43.
Weakness: CWE-770
Which versions are affected by CVE-2025-62666?
How do I fix CVE-2025-62666?
No fix has been published for CVE-2025-62666 yet. Limit exposure of the affected software until one is available.
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-2025-62666 being exploited?
There is no known exploitation of CVE-2025-62666 in the wild and no public exploit code.
Sources
Also known as GHSA-w49h-rmgr-rwp7.