Related Vulnerabilities: CVE-2020-35509  

Depending on the webserver configuration, a malicious user can supply an expired certificate and it would be accepted by Keycloak direct-grant authenticator. This is because Keycloak does not trigger the appropriate timestamp validation.

Severity Medium

Remote Yes

Type Certificate verification bypass

Description

Depending on the webserver configuration, a malicious user can supply an expired certificate and it would be accepted by Keycloak direct-grant authenticator. This is because Keycloak does not trigger the appropriate timestamp validation.

AVG-1332 keycloak 12.0.1-1 Medium Vulnerable

https://bugzilla.redhat.com/show_bug.cgi?id=1912427