CVE-2021-30458

Name	CVE-2021-30458
Description	An issue was discovered in Wikimedia Parsoid before 0.11.1 and 0.12.x before 0.12.2. An attacker can send crafted wikitext that Utils/WTUtils.php will transform by using a <meta> tag, bypassing sanitization steps, and potentially allowing for XSS.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	medium

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
mediawiki (PTS)	stretch	1:1.27.7-1~deb9u3	fixed
	stretch (security)	1:1.27.7-1~deb9u9	fixed
	buster, buster (security)	1:1.31.14-1~deb10u1	fixed
	bullseye, sid	1:1.35.2-1	fixed

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

Package	Type	Release	Fixed Version
mediawiki	source	stretch	(not affected)
mediawiki	source	buster	(not affected)
mediawiki	source	(unstable)	1:1.35.2-1

Notes

[buster] - mediawiki <not-affected> (Only applies to 1.35 and later)
[stretch] - mediawiki <not-affected> (Only applies to 1.35 and later)
https://phabricator.wikimedia.org/T279451