{"id":"CVE-2021-31545","details":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The page_recent_contributors leaked the existence of certain deleted MediaWiki usernames, related to rev_deleted.","aliases":["BIT-mediawiki-2021-31545"],"modified":"2026-03-14T01:44:15.697613Z","published":"2021-04-22T03:15:07.937Z","references":[{"type":"ADVISORY","url":"https://phabricator.wikimedia.org/T71367"},{"type":"REPORT","url":"https://gerrit.wikimedia.org/r/q/I8d5ed9ca84282ee50832035af86123633fc88293"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wikimedia/mediawiki","events":[{"introduced":"0"},{"last_affected":"e5823c068a2e0d8af72538fe5cd152ddb43c58e9"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.35.2"}]}}],"versions":["1.1.0","1.3.0beta1","1.35.0","1.35.0-rc.0","1.35.0-rc.1","1.35.0-rc.2","1.35.0-rc.3","1.35.1","1.35.2","1.5.0alpha1","1.5.0alpha2","1.5.0beta1","1.5.0beta2","1.5.0beta3","1.5.0beta4","1.6.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-31545.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}