{
  "id": "CVE-2025-27370",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2025-03-03T18:15:40.650",
  "lastModified": "2025-03-07T17:15:22.083",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenID Connect Core through 1.0 errata set 2 allows audience injection in certain situations. When the private_key_jwt authentication mechanism is used, a malicious Authorization Server could trick a Client into writing attacker-controlled values into the audience, including token endpoints or issuer identifiers of other Authorization Servers. The malicious Authorization Server could then use these private key JWTs to impersonate the Client."
    },
    {
      "lang": "es",
      "value": "OpenID Connect Core a trav\u00e9s del conjunto de erratas 1.0 2 permite la inyecci\u00f3n de audiencia en determinadas situaciones. Cuando se utiliza el mecanismo de autenticaci\u00f3n private_key_jwt, un servidor de autorizaci\u00f3n malintencionado podr\u00eda enga\u00f1ar a un cliente para que escriba valores controlados por el atacante en la audiencia, incluidos endpoints de token o identificadores de emisor de otros servidores de autorizaci\u00f3n. El servidor de autorizaci\u00f3n malintencionado podr\u00eda entonces utilizar estos JWT de clave privada para hacerse pasar por el cliente."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "cve@mitre.org",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:N",
          "baseScore": 6.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 4.7
      }
    ]
  },
  "weaknesses": [
    {
      "source": "cve@mitre.org",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-305"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/OWASP/ASVS/issues/2678",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://openid.net/notice-of-a-security-vulnerability/",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://openid.net/wp-content/uploads/2025/01/OIDF-Responsible-Disclosure-Notice-on-Security-Vulnerability-for-private_key_jwt.pdf",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://talks.secworkshop.events/osw2025/talk/R8D9BS/",
      "source": "cve@mitre.org"
    }
  ]
}