Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Keycloak | < 15.1.0 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2021-3856Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2010164Issue TrackingVendor Advisory
- https://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5dePatchThird Party Advisory
- https://github.com/keycloak/keycloak/pull/8588PatchThird Party Advisory
- https://issues.redhat.com/browse/KEYCLOAK-19422Permissions RequiredVendor Advisory
- https://access.redhat.com/security/cve/CVE-2021-3856Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2010164Issue TrackingVendor Advisory
- https://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5dePatchThird Party Advisory
- https://github.com/keycloak/keycloak/pull/8588PatchThird Party Advisory
- https://issues.redhat.com/browse/KEYCLOAK-19422Permissions RequiredVendor Advisory
FAQ
What is CVE-2021-3856?
CVE-2021-3856 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 exte...
How severe is CVE-2021-3856?
CVE-2021-3856 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3856?
Check the references section above for vendor advisories and patch information. Affected products include: Redhat Keycloak.