{"id":"CVE-2024-33999","aliases":["BIT-moodle-2024-33999","GHSA-r2wx-46gp-rp3h"],"url":"https://o3.security/vulnerability/CVE-2024-33999","summary":"moodle: unsafe direct use of $_SERVER['HTTP_REFERER'] in admin/tool/mfa/index.php","details":"Unsafe direct use of $_SERVER['HTTP_REFERER'] in admin/tool/mfa/index.php. The referrer URL used by MFA required additional sanitizing, rather than being used directly.","published":"2024-05-31T19:53:00.995Z","modified":"2026-08-12T03:51:47.161281650Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"moodle/moodle","fixedVersion":"4.3.4"}],"fix":null,"references":[{"type":"WEB","url":"https://git.moodle.org"},{"type":"WEB","url":"https://moodle.org/mod/forum/discuss.php?d=458387"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/33xxx/CVE-2024-33999.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-33999"},{"type":"PACKAGE","url":"https://github.com/moodle/moodle"},{"type":"WEB","url":"http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-80878"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:47.161281650Z"}}