CVE-2021-3754: Red Hat Keycloak

Medium severity, CVSS 5.3. EPSS: 2.1% chance of exploitation in the next 30 days.

A flaw was found in keycloak where an attacker is able to register himself with the username same as the email ID of any existing user. This may cause trouble in getting password recovery email in case the user forgets the password.

Affected products

• Red Hat Keycloak: affected versions not specified
• Red Hat Single Sign-On: version 7.0 only

Published 2022-08-26. Last modified 2026-06-17.