CVE-2025-66621

Full vulnerability record from the local CVENow database.

Description

Apache James SASL OAuthBearer/XOAUTH2 prior versions 3.9.1 fails to validate correctly AUD claim of JWT payloads when introspection is not configured. This allows an attacker with valid credentials to access the mail server even if they are not authorized to do so. We recommend users to upgrade to non vulnerable version that forces explicit configuration of aud claims and forces introspection.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

[email protected]

Published

2026-11-06 12:17:13.983000

Last modified

2026-11-06 19:17:03.073000

View original CVE JSON

{
  "id": "CVE-2025-66621",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-06T12:17:13.983",
  "lastModified": "2026-11-06T19:17:03.073",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache James",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "3.9.0",
              "lessThan": "3.9.1",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-345"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://lists.apache.org/thread.html/xz1g0blzcbxod69oktyq84h7t06xzov6",
      "source": "[email protected]"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/11/06/13",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ]
}