Security advisory

{
  "id": "3d04ab06223ebee1d10602aeaef1088522006e128e97bf946143c148295894d7",
  "url": "https://osv.dev/vulnerability/CVE-2021-41246",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-41246",
    "summary": "Express OpenID Connect is express JS middleware implementing sign on for Express web apps using OpenID Connect. Versions before and including `2.5.1` do not regenerate the session id and session cookie when user logs in. This behavior opens up the application to various session fixation vulnerabilities. Versions `2.5.2` contains a patch for this issue.",
    "evidence": "osv:CVE-2021-41246",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-41246",
      "aliases": [
        "CVE-2021-41246",
        "GHSA-7rg2-qxmf-hhx9"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/auth0/express-openid-connect",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5566d1a941fc2a1487c242204c07e5805c4913f7"
                },
                {
                  "fixed": "c2557569e62b6136b249aa6b6fce41252af7dc5c"
                },
                {
                  "fixed": "5ab67ff2bd84f76674066b5e129b43ab5f2f430f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:auth0:express_openid_connect:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "2.3.0"
                      },
                      {
                        "fixed": "2.5.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "5ab67ff2bd84f76674066b5e129b43ab5f2f430f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c2557569e62b6136b249aa6b6fce41252af7dc5c"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.5.2"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.5.1",
            "v2.5.0",
            "v2.4.0",
            "v2.3.1",
            "v2.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41246.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:58.719484473Z",
      "provider": "osv",
      "references": [
        "https://github.com/auth0/express-openid-connect/releases/tag/v2.5.2",
        "https://github.com/auth0/express-openid-connect/security/advisories/GHSA-7rg2-qxmf-hhx9",
        "https://github.com/auth0/express-openid-connect/commit/5ab67ff2bd84f76674066b5e129b43ab5f2f430f"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-41246",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386611,
  "published_at": "2021-12-09T16:15:08.383+00:00"
}