Moodle: router produces json instead of 404 error for invalid course id

{
  "id": "f773f0da4ced1efc9bd7117daf63565f12a279379379a8d90d0af41be2cd3001",
  "url": "https://osv.dev/vulnerability/CVE-2025-62397",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Moodle: router produces json instead of 404 error for invalid course id",
    "summary": "The router’s inconsistent response to invalid course IDs allowed attackers to infer which course IDs exist, potentially aiding reconnaissance.",
    "evidence": "osv:CVE-2025-62397",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-62397",
      "aliases": [
        "BIT-moodle-2025-62397",
        "CVE-2025-62397"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/moodle/moodle",
              "type": "GIT",
              "events": [
                {
                  "introduced": "78e860178314c45441a21e0b99455400b8283d48"
                },
                {
                  "fixed": "1b2d270397613a3889a24f59be0ee6d0292a7556"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.0.0"
                      },
                      {
                        "fixed": "5.0.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v5.0.2",
            "v5.0.1",
            "v5.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-62397.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.849288605Z",
      "provider": "osv",
      "references": [
        "https://git.moodle.org",
        "https://access.redhat.com/security/cve/CVE-2025-62397",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62397.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-62397",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2404430"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-209"
        ],
        "cna_assigner": "fedora",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "5.0.0"
                  },
                  {
                    "fixed": "5.0.3"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62397.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-62397",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 513956,
  "published_at": "2025-10-23T11:28:33.922+00:00"
}