{"id":"CVE-2020-27957","details":"The RandomGameUnit extension for MediaWiki through 1.35 was not properly escaping various title-related data. When certain varieties of games were created within MediaWiki, their names or titles could be manipulated to generate stored XSS within the RandomGameUnit extension.","aliases":["BIT-mediawiki-2020-27957"],"modified":"2026-04-10T04:26:41.937645Z","published":"2020-10-28T03:15:12.647Z","references":[{"type":"FIX","url":"https://gerrit.wikimedia.org/r/q/I497d2076038f75c9eb77e0e250f2af56f5bd2bfc"},{"type":"EVIDENCE","url":"https://phabricator.wikimedia.org/T266400"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wikimedia/mediawiki","events":[{"introduced":"0"},{"last_affected":"2303b05125b2cc046a20d614786174ea803143eb"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.35"}]}}],"versions":["1.1.0","1.3.0beta1","1.35.0-rc.0","1.35.0-rc.1","1.5.0alpha1","1.5.0alpha2","1.5.0beta1","1.5.0beta2","1.5.0beta3","1.5.0beta4","1.6.0","fundraising/REL1_35"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27957.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"}]}