{"id":"CVE-2021-31548","aliases":["BIT-mediawiki-2021-31548","EUVD-2021-18445","GHSA-773v-8w82-h42v"],"status":"published","title":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. A MediaWiki...","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. A MediaWiki user who is partially blocked or was unsuccessfully blocked could bypass AbuseFilter and have their edits completed.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00718,"percentile":0.54339,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-668","CWE-863"],"published":"2021-04-22T02:30:22Z","modified":"2026-10-24T10:30:43Z","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/T272333","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web","advisory"]},{"url":"https://gerrit.wikimedia.org/r/q/Ifac795125927d584a31d95e1b4c4241eef860fa1","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31548","tags":["web"]},{"url":"https://github.com/advisories/GHSA-773v-8w82-h42v"}],"sources":{"cve":[{"id":"CVE-2021-31548","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. A MediaWiki user who is partially blocked or was unsuccessfully blocked could bypass AbuseFilter and have their edits completed.","status":"published","published":"2021-04-22T02:30:22Z","modified":"2024-08-03T23:03:33.388Z","updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18445","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. A MediaWiki user who is partially blocked or was unsuccessfully blocked could bypass AbuseFilter and have their edits completed.","status":"published","published":"2021-04-22T02:30:22Z","modified":"2024-08-03T23:03:33Z","updated_at":"2026-11-03T03:24:38.977347Z"}],"ghsa":[{"id":"GHSA-773v-8w82-h42v","title":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. A MediaWiki...","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. A MediaWiki user who is partially blocked or was unsuccessfully blocked could bypass AbuseFilter and have their edits completed.","status":"published","published":"2022-05-24T17:48:07Z","modified":"2023-01-27T05:02:45Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:42:05.930236Z"}],"nvd":[{"id":"CVE-2021-31548","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. A MediaWiki user who is partially blocked or was unsuccessfully blocked could bypass AbuseFilter and have their edits completed.","status":"published","published":"2021-04-22T03:15:08.033Z","modified":"2026-06-17T03:51:59.197Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:06:52.03307Z"}],"osv":[{"id":"CVE-2021-31548","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. A MediaWiki user who is partially blocked or was unsuccessfully blocked could bypass AbuseFilter and have their edits completed.","status":"published","published":"2021-04-22T03:15:08.033Z","modified":"2026-10-24T10:30:43.919100103Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.483607Z"},{"id":"BIT-mediawiki-2021-31548","description":"An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. A MediaWiki user who is partially blocked or was unsuccessfully blocked could bypass AbuseFilter and have their edits completed.","status":"published","published":"2024-03-06T11:12:18.175Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}