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Test your applicationsUpgrade org.keycloak:keycloak-saml-wildfly-elytron-adapter
to version 22.0.12, 24.0.7, 25.0.5 or higher.
Affected versions of this package are vulnerable to Session Fixation due to the improper handling of session IDs and JSESSIONID cookies during the login process. An attacker can hijack the current session before authentication to trigger session fixation.