ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's external JWT Identity Provider validates a token's signature and issuer (iss) but not the audience (aud) claim, allowing a validly signed token from a trusted issuer for another relying party to be accepted by ZITADEL. This issue is fixed in versions 3.4.12 and 4.15.2.
Exploitability
AV:NAC:HPR:LUI:NScope
S:UImpact
C:LI:LA:N4.2/CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:NOther