CVE-2025-61634 PUBLISHED

HTML rest endpoint needs PoolCounter and proper parser cache check

Assigner: wikimedia-foundation
Reserved: 29.09.2025 Published: 02.02.2026 Updated: 02.02.2026

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:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/RE:M/U:Green
CVSS Score: 0

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	None
User Interaction	Active

CVSS 4.0

Vendor	Wikimedia Foundation
Product	MediaWiki
Versions	Default: unaffected affected from * to 1.39.14, 1.43.4, 1.44.1 (excl.)