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.
Remediation
References
https://access.redhat.com/security/cve/CVE-2021-3856
https://bugzilla.redhat.com/show_bug.cgi?id=2010164
https://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743
https://github.com/keycloak/keycloak/pull/8588
https://issues.redhat.com/browse/KEYCLOAK-19422
Related Vulnerabilities
CVE-2018-1230 Vulnerability in maven package org.springframework.batch:spring-batch-admin
CVE-2021-28161 Vulnerability in npm package @wiptheia/core
CVE-2015-8854 Vulnerability in maven package org.webjars:marked
CVE-2014-0050 Vulnerability in maven package org.apache.jackrabbit:oak-run
CVE-2023-33201 Vulnerability in maven package org.bouncycastle:bcprov-jdk15on