Security advisory

{
  "id": "db56779542906a370db7dc7aece10f72e3b8b28952657076908e5e2efad458d3",
  "url": "https://osv.dev/vulnerability/CVE-2018-1000531",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-1000531",
    "summary": "inversoft prime-jwt version prior to commit abb0d479389a2509f939452a6767dc424bb5e6ba contains a CWE-20 vulnerability in JWTDecoder.decode that can result in an incorrect signature validation of a JWT token. This attack can be exploitable when an attacker crafts a JWT token with a valid header using 'none' as algorithm and a body to requests it be validated. This vulnerability was fixed after commit abb0d479389a2509f939452a6767dc424bb5e6ba.",
    "evidence": "osv:CVE-2018-1000531",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-1000531",
      "aliases": [
        "CVE-2018-1000531"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ws-apps/prime-jwt",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "8011cd2a8eb64dd338fddf88e0e855b2a6b734e7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:inversoft:prime-jwt:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.3.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.3.0",
            "1.2.1",
            "1.2.0",
            "1.1.0",
            "1.0.0",
            "0.2.1",
            "0.2.0",
            "0.1.6",
            "0.1.5",
            "0.1.4",
            "0.1.3",
            "0.1.2",
            "0.1.1",
            "0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-1000531.json"
          }
        }
      ],
      "modified": "2026-10-24T10:47:37.011750554Z",
      "provider": "osv",
      "references": [
        "https://github.com/inversoft/prime-jwt/issues/3"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-1000531",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441401,
  "published_at": "2018-06-26T16:29:01.807+00:00"
}