Vulnerability Description
In certain IETF OAuth 2.0-related specifications, when the JSON Web Token Profile for OAuth 2.0 Client Authentication mechanism is used, there are ambiguities in the audience values of JWTs sent to authorization servers. The affected RFCs may include RFC 7523, and also RFC 7521, RFC 7522, RFC 9101 (JAR), and RFC 9126 (PAR).
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://eprint.iacr.org/2025/629
- https://github.com/OWASP/ASVS/issues/2678
- https://openid.net/notice-of-a-security-vulnerability/
- https://openid.net/wp-content/uploads/2025/01/OIDF-Responsible-Disclosure-Notice
- https://talks.secworkshop.events/osw2025/talk/R8D9BS/
FAQ
What is CVE-2025-27371?
CVE-2025-27371 is a vulnerability with a CVSS score of 6.9 (MEDIUM). In certain IETF OAuth 2.0-related specifications, when the JSON Web Token Profile for OAuth 2.0 Client Authentication mechanism is used, there are ambiguities in the audience values of JWTs sent to au...
How severe is CVE-2025-27371?
CVE-2025-27371 has been rated MEDIUM with a CVSS base score of 6.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-27371?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.