CVE-2021-4133

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.

• CWE-863
• CWE-863

• https://bugzilla.redhat.com/show_bug.cgi?id=2033602Issue Tracking, Third Party Advisory
• https://github.com/keycloak/keycloak/issues/9247Third Party Advisory
• https://github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487Third Party Advisory
• https://www.oracle.com/security-alerts/cpuapr2022.htmlNot Applicable
• https://bugzilla.redhat.com/show_bug.cgi?id=2033602Issue Tracking, Third Party Advisory
• https://github.com/keycloak/keycloak/issues/9247Third Party Advisory
• https://github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487Third Party Advisory
• https://www.oracle.com/security-alerts/cpuapr2022.htmlNot Applicable

Published

Jan 25, 2022

Last Modified

Jun 17, 2026

Status

Modified

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