Keycloak < 21.1.2 - Cross-Site Scripting via AssertionConsumerServiceURL or redirect_uri
Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the SAML or OIDC providers. The vulnerability can allow an attacker to execute malicious scripts by setting the AssertionConsumerServiceURL value or the redirect_uri.