CVE-2021-3856
Keycloak has Files or Directories Accessible to External Parties
4.3
MEDIUM
CVSS 3.1
EPSS 0.36%
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.
How to fix CVE-2021-3856
To remediate CVE-2021-3856, upgrade the affected package to a fixed version below.
- —upgrade to 15.1.0 or later
Is CVE-2021-3856 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 15.1.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |