CVE-2021-4133: Incorrect Authorization

January 25, 2022 (updated September 5, 2022)

A flaw was found in Keycloak 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.

References

bugzilla.redhat.com/show_bug.cgi?id=2033602
github.com/keycloak/keycloak/issues/9247
github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487
nvd.nist.gov/vuln/detail/CVE-2021-4133

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