CVSS 3.1
4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NCVE-2021-3856
Medium (4.3) in redhat keycloak. EPSS 1.2% chance of exploitation in the next 30 days. Fixed in org.keycloak:keycloak-core 15.1.0.
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.
Severity
- EPSS
- 1.2% chance of exploitation in the next 30 days; higher than 67% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-22, CWE-552
- Published
- Modified
- Record from
- the NVD, synced
Affected
- redhat:keycloak
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-3w4v-rvc4-2xpw | Maven | org.keycloak:keycloak-core | <15.1.0 | 15.1.0 |