Low severity · published Feb 2, 2026
CVE-2025-61634
HTML rest endpoint needs PoolCounter and proper parser cache check
3.1
CVSS
0.3%
EPSS
No
On KEV
Description
Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Rest/Handler/PageHTMLHandler.Php.
This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
MediaWiki · Wikimedia Foundation
before 1.39.14, 1.43.4, 1.44.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-61634
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-61634
Permissions Required
https://phabricator.wikimedia.org/T387478
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