CVE-2025-66621 medium vulnerability summary
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 ser...
CVE-2025-66621 is a Medium severity vulnerability notice that security teams should triage for exposure in their own environments.
What to review
The affected area appears to involve Apache James SASL OAuthBearer/XOAUTH2 prior versions 3.9.1 fails to validate correctly AUD claim of JWT payloads when introspection. Administrators should compare this notice against their asset inventory, dependency list, and externally exposed services.
Recommended action
Confirm whether the affected product or library is present, review vendor guidance, prioritize patching based on internet exposure and severity, and monitor logs for suspicious behavior tied to the affected component.
This brief is based on information from Tenable Newest CVEs . Please refer to the original source for the complete advisory and vendor-specific guidance.
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