{"id":"CVE-2021-31549","aliases":["BIT-mediawiki-2021-31549","EUVD-2021-18446","GHSA-cg23-hq5c-fqvx"],"status":"published","title":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The Special...","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The Special:AbuseFilter/examine form allowed for the disclosure of suppressed MediaWiki usernames to unprivileged users.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00831,"percentile":0.5807,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2021-04-22T02:30:10Z","modified":"2026-10-24T10:30:48Z","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/T274152","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web","advisory"]},{"url":"https://gerrit.wikimedia.org/r/q/I6063c02fa261c4cc0e6dbbb2db4e111eb85912c2","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Vendor Advisory","web","report"]},{"url":"https://gerrit.wikimedia.org/r/q/I71a6d521bd12931ce60eec4d2dc35af19146000f","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Vendor Advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31549","tags":["web"]},{"url":"https://github.com/advisories/GHSA-cg23-hq5c-fqvx"}],"sources":{"cve":[{"id":"CVE-2021-31549","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The Special:AbuseFilter/examine form allowed for the disclosure of suppressed MediaWiki usernames to unprivileged users.","status":"published","published":"2021-04-22T02:30:10Z","modified":"2024-08-03T23:03:33.235Z","updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18446","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The Special:AbuseFilter/examine form allowed for the disclosure of suppressed MediaWiki usernames to unprivileged users.","status":"published","published":"2021-04-22T02:30:10Z","modified":"2024-08-03T23:03:33Z","updated_at":"2026-11-03T03:24:38.977347Z"}],"ghsa":[{"id":"GHSA-cg23-hq5c-fqvx","title":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The Special...","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The Special:AbuseFilter/examine form allowed for the disclosure of suppressed MediaWiki usernames to unprivileged users.","status":"published","published":"2022-05-24T17:48:08Z","modified":"2023-01-29T05:06:01Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:45:55.677123Z"}],"nvd":[{"id":"CVE-2021-31549","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The Special:AbuseFilter/examine form allowed for the disclosure of suppressed MediaWiki usernames to unprivileged users.","status":"published","published":"2021-04-22T03:15:08.067Z","modified":"2026-06-17T03:51:59.31Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:06:52.03307Z"}],"osv":[{"id":"CVE-2021-31549","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The Special:AbuseFilter/examine form allowed for the disclosure of suppressed MediaWiki usernames to unprivileged users.","status":"published","published":"2021-04-22T03:15:08.067Z","modified":"2026-10-24T10:30:48.772121072Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.483607Z"},{"id":"BIT-mediawiki-2021-31549","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The Special:AbuseFilter/examine form allowed for the disclosure of suppressed MediaWiki usernames to unprivileged users.","status":"published","published":"2024-03-06T11:12:14.882Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}