Vulnerability record/PUBLISHED/Published Nov 6, 2026 11:38:46 UTC
CVE-2025-66621
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.
Base scoreN/A/ 10
SeverityNoneCVSS unscored
Exploitability / impact
CVSS metric breakdown
Base severityNone
No CVSS vector is available for this record.
CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.
Record context
CVE Numbering Authorityapache
Last updatedNov 6, 2026 11:38:46 UTC
PublishedNov 6, 2026 11:38:46 UTC
ReservedDec 5, 2025 15:03:47 UTC
Credits
- The Apache James PMC would like to thanks Felix Auringer for this report