An issue was discovered in MediaWiki before 1.35.14, 1.36.x through 1.39.x before 1.39.6, and 1.40.x before 1.40.2. In includes/logging/RightsLogFormatter.php, group-*-member messages can result in XSS on Special:log/rights. https://phabricator.wikimedia.org/T347726 https://lists.wikimedia.org/hyperkitty/list/mediawiki-announce@lists.wikimedia.org/thread/TDBUBCCOQJUT4SCHJNPHKQNPBUUETY52/
Created mediawiki tracking bugs for this issue: Affects: fedora-all [bug 2255583]