Security advisory

{
  "id": "2a837574b2f3704631b8ea12244483da304b2d6611853c98687f055ae6628f5d",
  "url": "https://osv.dev/vulnerability/CVE-2020-36255",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-36255",
    "summary": "An issue was discovered in IdentityModel (aka ScottBrady.IdentityModel) before 1.3.0. The Branca implementation allows an attacker to modify and forge authentication tokens.",
    "evidence": "osv:CVE-2020-36255",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-36255",
      "aliases": [
        "CVE-2020-36255"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/scottbrady91/identitymodel",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "d1c1de09a1d684e90318fffe2628962970d85dee"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:identitymodel_project:identitymodel:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.3.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.2.0",
            "1.1.0",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-36255.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:20.985632915Z",
      "provider": "osv",
      "references": [
        "https://github.com/scottbrady91/IdentityModel/issues/3",
        "https://github.com/scottbrady91/IdentityModel/issues/4",
        "https://github.com/scottbrady91/IdentityModel/compare/1.2.0...1.3.0"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-36255",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385127,
  "published_at": "2021-03-05T03:15:12.51+00:00"
}