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.
https://github.com/keycloak/keycloak/commit/a1cfe6e24e5b34792699a00b8b4a8016a5929e3a