CVE-2018-14655: Red Hat Keycloak

Medium severity, CVSS 5.4. EPSS: 1.2% chance of exploitation in the next 30 days.

A flaw was found in Keycloak 3.4.3.Final, 4.0.0.Beta2, 4.3.0.Final. When using 'response_mode=form_post' it is possible to inject arbitrary Javascript-Code via the 'state'-parameter in the authentication URL. This allows an XSS-Attack upon succesfully login.

Affected products

• Red Hat Keycloak: version 3.4.3 only; version 4.0.0 only; version 4.3.0 only
• Red Hat Single Sign-On: version 7.2 only; affected versions not specified

Published 2018-11-13. Last modified 2026-06-17.