Description
A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.
Remediation
References
https://bugzilla.redhat.com/show_bug.cgi?id=2033602
https://github.com/keycloak/keycloak/issues/9247
https://github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487
https://www.oracle.com/security-alerts/cpuapr2022.html
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