{"id":"CVE-2021-31545","aliases":["BIT-mediawiki-2021-31545","EUVD-2021-18442","GHSA-gjvq-jhqf-q4gj"],"status":"published","title":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The...","description":"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.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00851,"percentile":0.58632,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2021-04-22T02:30:59Z","modified":"2026-10-24T10:30:29Z","fixes":[{"ecosystem":"Bitnami","package":"mediawiki","fixed_in":["1.35.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"mediawiki","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.35.3"}]}]}],"products":[{"vendor":"mediawiki","product":"mediawiki"}],"references":[{"url":"https://phabricator.wikimedia.org/T71367","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web","advisory"]},{"url":"https://gerrit.wikimedia.org/r/q/I8d5ed9ca84282ee50832035af86123633fc88293","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Vendor Advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31545","tags":["web"]},{"url":"https://github.com/advisories/GHSA-gjvq-jhqf-q4gj"}],"sources":{"cve":[{"id":"CVE-2021-31545","description":"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.","status":"published","published":"2021-04-22T02:30:59Z","modified":"2024-08-03T23:03:33.417Z","updated_at":"2026-11-02T14:33:05.331617Z"}],"euvd":[{"id":"EUVD-2021-18442","description":"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.","status":"published","published":"2021-04-22T02:30:59Z","modified":"2024-08-03T23:03:33Z","updated_at":"2026-11-03T03:24:38.977347Z"}],"ghsa":[{"id":"GHSA-gjvq-jhqf-q4gj","title":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The...","description":"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.","status":"published","published":"2022-05-24T17:48:07Z","modified":"2023-01-29T05:06:01Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:45:55.677123Z"}],"nvd":[{"id":"CVE-2021-31545","description":"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.","status":"published","published":"2021-04-22T03:15:07.937Z","modified":"2026-06-17T03:51:58.85Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:06:52.03307Z"}],"osv":[{"id":"CVE-2021-31545","description":"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.","status":"published","published":"2021-04-22T03:15:07.937Z","modified":"2026-10-24T10:30:29.881998688Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.483607Z"},{"id":"BIT-mediawiki-2021-31545","description":"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.","status":"published","published":"2024-03-06T11:12:28.801Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}