moodle: unsafe direct use of $_SERVER['HTTP_REFERER'] in admin/tool/mfa/index.php

{
  "id": "53fcbd924eab0f6e250ae68df99d47204fd08e48c02bad583636bb72fad800c0",
  "url": "https://osv.dev/vulnerability/CVE-2024-33999",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "moodle: unsafe direct use of $_SERVER['HTTP_REFERER'] in admin/tool/mfa/index.php",
    "summary": "The referrer URL used by MFA required additional sanitizing, rather than being used directly.",
    "evidence": "osv:CVE-2024-33999",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2024-33999",
      "aliases": [
        "BIT-moodle-2024-33999",
        "CVE-2024-33999",
        "GHSA-r2wx-46gp-rp3h"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/moodle/moodle",
              "type": "GIT",
              "events": [
                {
                  "introduced": "fe7aff8093240cc373f1ddaa66ecb91c4bc0a09f"
                },
                {
                  "fixed": "143c2cd5bef1268751d58bbfc6c66c1d93cb9797"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.3.0"
                      },
                      {
                        "fixed": "4.3.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.3.3",
            "v4.3.2",
            "v4.3.1",
            "v4.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-33999.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.437431081Z",
      "provider": "osv",
      "references": [
        "https://git.moodle.org",
        "https://moodle.org/mod/forum/discuss.php?d=458387",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/33xxx/CVE-2024-33999.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-33999"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20"
        ],
        "cna_assigner": "fedora",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "4.3"
                  },
                  {
                    "last_affected": "4.3.3"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/33xxx/CVE-2024-33999.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-33999",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505884,
  "published_at": "2024-05-31T19:53:00.995+00:00"
}