CVE-2025-11261

Name	CVE-2025-11261
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.Language/mediawiki.Language.Js. This issue affects MediaWiki: from * before 1.39.15, 1.43.5, 1.44.2.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4355-1, DSA-6085-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
mediawiki (PTS)	bookworm, bookworm (security)	1:1.39.17-1+deb12u2	fixed
	trixie (security), trixie	1:1.43.9+dfsg-1~deb13u1	fixed
	forky, sid	1:1.43.9+dfsg-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
mediawiki	source	bullseye	1:1.35.13-1+deb11u5	DLA-4355-1
mediawiki	source	bookworm	1:1.39.17-1~deb12u1	DSA-6085-1
mediawiki	source	trixie	1:1.43.6+dfsg-1~deb13u1	DSA-6085-1
mediawiki	source	(unstable)	1:1.43.5+dfsg-1

https://phabricator.wikimedia.org/T406322
https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1193414