A flaw was found in Keycloak. Keycloak's Security Assertion Markup Language (SAML) broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response. This allows the attacker to inject an encrypted assertion for an arbitrary principal, leading to unauthorized access and potential information disclosure.
Exploitability
AV:NAC:HPR:LUI:NScope
S:CImpact
C:HI:LA:L7.7/CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:LOther