Security advisory

{
  "id": "4a70d4d933760c497e4d043c1c0bca5766d113bd456ba25729105625bf4821f7",
  "url": "https://osv.dev/vulnerability/CVE-2021-20718",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-20718",
    "summary": "mod_auth_openidc 2.4.0 to 2.4.7 allows a remote attacker to cause a denial-of-service (DoS) condition via unspecified vectors.",
    "evidence": "osv:CVE-2021-20718",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-20718",
      "aliases": [
        "CVE-2021-20718"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openidc/mod_auth_openidc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7783ea7e9dd69a99ddb0221af1935624d1841f51"
                },
                {
                  "last_affected": "f27ec497a7fab7a7c3d69fa9462c8369d6f2a98a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.4.0"
                      },
                      {
                        "last_affected": "2.4.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.4.7",
            "v2.4.6",
            "v2.4.5",
            "v2.4.4.1",
            "v2.4.4",
            "v2.4.3",
            "v2.4.2.1",
            "v2.4.2",
            "v2.4.1",
            "v2.4.0.4",
            "v2.4.0.3",
            "v2.4.0.2",
            "v2.4.0.1",
            "v2.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20718.json"
          }
        }
      ],
      "modified": "2026-10-24T10:50:04.366879552Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5HJK366TLFEOIYWTHQSZO24MSDPBXHJU/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FV4KYMQWPS3I2QPW2C253MLIAFGBZPLK/",
        "https://jvn.jp/en/jp/JVN49704918/index.html",
        "https://www.oracle.com/security-alerts/cpujan2022.html",
        "https://www.zmartzone.eu/",
        "https://github.com/zmartzone/mod_auth_openidc"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:oracle:essbase:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:essbase",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "21.3"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "33"
                  },
                  {
                    "last_affected": "33"
                  },
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-20718",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441926,
  "published_at": "2021-05-20T02:15:07.117+00:00"
}