CVE-2025-27370
CVE-2025-27370
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 6.9EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
03 Mar 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
OpenID Connect Core through 1.0 errata set 2 allows audience injection in certain situations. When the private_key_jwt authentication mechanism is used, a malicious Authorization Server could trick a Client into writing attacker-controlled values into the audience, including token endpoints or issuer identifiers of other Authorization Servers. The malicious Authorization Server could then use these private key JWTs to impersonate the Client.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:N
Affected products
OpenID · OpenID ConnectWant to know if your infrastructure is exposed to this?
Talk to TrueHacking →References
https://eprint.iacr.org/2025/629https://github.com/OWASP/ASVS/issues/2678https://openid.net/notice-of-a-security-vulnerability/https://openid.net/wp-content/uploads/2025/01/OIDF-Responsible-Disclosure-Notice-on-Security-Vulnerability-for-private_key_jwt.pdfhttps://talks.secworkshop.events/osw2025/talk/R8D9BS/