CVE-2021-30157

Name	CVE-2021-30157
Description	An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. On ChangesList special pages such as Special:RecentChanges and Special:Watchlist, some of the rcfilters-filter-* label messages are output in HTML unescaped, leading to XSS.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-4889-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
mediawiki (PTS)	bullseye (security), bullseye	1:1.35.13-1+deb11u2	fixed
	bookworm, bookworm (security)	1:1.39.7-1~deb12u1	fixed
	sid, trixie	1:1.39.8-1	fixed

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

Package	Type	Release	Fixed Version	Origin
mediawiki	source	stretch	(not affected)
mediawiki	source	buster	1:1.31.14-1~deb10u1	DSA-4889-1
mediawiki	source	(unstable)	1:1.35.2-1

Notes

[stretch] - mediawiki <not-affected> (Vulnerable code not present)
https://phabricator.wikimedia.org/T278058
https://gerrit.wikimedia.org/r/c/mediawiki/core/+/674085