{"id":"CVE-2023-37255","aliases":["BIT-mediawiki-2023-37255","EUVD-2023-41175","GHSA-c5v4-mrjh-44fj"],"status":"published","title":"An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In Special...","description":"An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In Special:CheckUser, a check of the \"get edits\" type is vulnerable to HTML injection through the User-Agent HTTP request header.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00467,"percentile":0.40683,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2023-06-29T00:00:00Z","modified":"2026-10-28T02:31:02Z","fixes":[{"ecosystem":"Bitnami","package":"mediawiki","fixed_in":["1.39.4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"mediawiki","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.39.4"}]}]}],"products":[{"vendor":"mediawiki","product":"mediawiki"}],"references":[{"url":"https://phabricator.wikimedia.org/T333569","tags":["x_transferred","Exploit","Issue Tracking","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-37255","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-c5v4-mrjh-44fj"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/37xxx/CVE-2023-37255.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-37255","description":"An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In Special:CheckUser, a check of the \"get edits\" type is vulnerable to HTML injection through the User-Agent HTTP request header.","status":"published","published":"2023-06-29T00:00:00Z","modified":"2024-11-26T19:36:50.3Z","updated_at":"2026-11-02T14:35:16.454633Z"}],"euvd":[{"id":"EUVD-2023-41175","description":"An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In Special:CheckUser, a check of the \"get edits\" type is vulnerable to HTML injection through the User-Agent HTTP request header.","status":"published","published":"2023-06-29T00:00:00Z","modified":"2024-11-26T19:36:50Z","updated_at":"2026-11-03T00:04:46.610778Z"}],"ghsa":[{"id":"GHSA-c5v4-mrjh-44fj","title":"An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In Special...","description":"An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In Special:CheckUser, a check of the \"get edits\" type is vulnerable to HTML injection through the User-Agent HTTP request header.","status":"published","published":"2023-06-29T18:30:57Z","modified":"2024-04-04T05:17:56Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:56:31.130891Z"}],"nvd":[{"id":"CVE-2023-37255","description":"An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In Special:CheckUser, a check of the \"get edits\" type is vulnerable to HTML injection through the User-Agent HTTP request header.","status":"published","published":"2023-06-29T16:15:10.043Z","modified":"2026-06-17T06:07:49.523Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:08:14.715708Z"}],"osv":[{"id":"BIT-mediawiki-2023-37255","description":"An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In Special:CheckUser, a check of the \"get edits\" type is vulnerable to HTML injection through the User-Agent HTTP request header.","status":"published","published":"2024-03-06T11:00:40.972Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"},{"id":"CVE-2023-37255","description":"An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In Special:CheckUser, a check of the \"get edits\" type is vulnerable to HTML injection through the User-Agent HTTP request header.","status":"published","published":"2023-06-29T00:00:00Z","modified":"2026-10-28T02:31:02.947217806Z","updated_at":"2026-11-02T15:44:32.510144Z"}]}}