{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-11-06T19:05:02.068Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/11/06/13"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache James",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "3.9.1",
              "status": "affected",
              "version": "3.9.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "The Apache James PMC would like to thanks Felix Auringer for this report"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Apache James SASL OAuthBearer/XOAUTH2 prior versions 3.9.1 fails to validate correctly AUD claim of JWT payloads when introspection is not configured.\u003cbr\u003e\u003cbr\u003eThis allows an attacker with valid credentials to access the mail server even if they are not authorized to do so.\u003cbr\u003e\u003cbr\u003eWe recommend users to upgrade to non vulnerable version that forces explicit configuration of aud claims and forces introspection."
            }
          ],
          "value": "Apache James SASL OAuthBearer/XOAUTH2 prior versions 3.9.1 fails to validate correctly AUD claim of JWT payloads when introspection is not configured.\n\nThis allows an attacker with valid credentials to access the mail server even if they are not authorized to do so.\n\nWe recommend users to upgrade to non vulnerable version that forces explicit configuration of aud claims and forces introspection."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "moderate"
            },
            "type": "Textual description of severity"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-345",
              "description": "CWE-345 Insufficient Verification of Data Authenticity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-06T11:38:46.849Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.apache.org/thread.html/xz1g0blzcbxod69oktyq84h7t06xzov6"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Apache James: SASL OAUTHBEARER do not validate aud in JWT payload if misconfigred",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2025-66621",
    "datePublished": "2026-11-06T11:38:46.849Z",
    "dateReserved": "2025-12-05T15:03:47.661Z",
    "dateUpdated": "2026-11-06T19:05:02.068Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}