CVE-2021-3856 Information

Description

ClassLoaderTheme and ClasspathThemeResourceProviderFactory allows reading any file available as a resource to the classloader. By sending requests for theme resources with a relative path from an external HTTP client the client will receive the content of random files if available.

Reference

https://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743 https://bugzilla.redhat.com/show_bug.cgi?id=2010164 https://access.redhat.com/security/cve/CVE-2021-3856 https://issues.redhat.com/browse/KEYCLOAK-19422 https://github.com/keycloak/keycloak/pull/8588