Vulnerability · Published Feb 2, 2026 · Assigned by wikimedia-foundation

CVE-2025-61644i18n XSS through Special:Watchlist

None 0.0

In plain English

A cross-site scripting in MediaWiki from Wikimedia Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 4.0)0.0None

Exploit odds (30 days)0.3%top 77.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Rcfilters/ui/WatchlistTopSectionWidget.Js. This issue affects MediaWiki: from * before > fb856ce9cf121e046305116852cca4899ecb48ca.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Ubuntu:25.10	mediawiki	no fix listed	UBUNTU-CVE-2025-61644
Ubuntu:26.04:LTS	mediawiki	no fix listed	UBUNTU-CVE-2025-61644
Ubuntu:26.10	mediawiki	no fix listed	UBUNTU-CVE-2025-61644

Affected products (as reported)

Vendor	Product	Versions
Wikimedia Foundation	MediaWiki	* – before > fb856ce9cf121e046305116852cca4899ecb48ca

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

References

https://phabricator.wikimedia.org/T403411