EPSS
Percentile
47.8%
In MediaWiki before 1.35.1, the combination of Html::rawElement and Message::text leads to XSS because the definition of MediaWiki:recentchanges-legend-watchlistexpiry can be changed onwiki so that the output is raw HTML.
lists.fedoraproject.org/archives/list/[email protected]/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/
lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html
phabricator.wikimedia.org/T268894
security-tracker.debian.org/tracker/CVE-2020-35474