CVE-2021-3513: Red Hat Keycloak

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

A flaw was found in keycloak where a brute force attack is possible even when the permanent lockout feature is enabled. This is due to a wrong error message displayed when wrong credentials are entered. The highest threat from this vulnerability is to confidentiality.

Affected products

• Red Hat Keycloak: before 13.0.0 (fixed in 13.0.0)

Published 2022-08-22. Last modified 2026-06-17.