Path Traversal in Red Hat Keycloak
CVE-2021-3856
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.011 (65.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000
Affected products
- Red Hat Keycloak
- Keycloak — versions Fixed in 15.1.0
Weakness classification (CWE)
References
- issues.redhat.com/browse/KEYCLOAK-19422 (Permissions Required, Vendor Advisory)
- github.com/keycloak/keycloak/pull/8588 (Patch, Third Party Advisory)
- github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743 (Patch, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Issue Tracking, Vendor Advisory)
- access.redhat.com/security/cve/CVE-2021-3856 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-3856?
- CVE-2021-3856 is a medium-severity vulnerability in Red Hat Keycloak, classified under Files or Directories Accessible to External Parties. CVSS score: 4.3/10. Published 2022-08-26.
- How severe is CVE-2021-3856?
- Medium severity. CVSS v3 base score is 4.3 out of 10.