Deserialization in Keycloak
CVE-2025-13467
A flaw was found in the Keycloak LDAP User Federation provider. This vulnerability allows an authenticated realm administrator to trigger deserialization of untrusted Java objects via a malicious LDAP server configuration.
Vulnerability class: Insecure Deserialization
EPSS: 0.004 (36.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N.
Affected products
- Keycloak — versions 0
- Red Hat Build Of Keycloak 26.2 — versions 26.2.11-1, 26.2-12
- Red Hat Build Of Keycloak 26.2.11
- Red Hat Build Of Keycloak 26.4 — versions 26.4.6-1, 26.4-6, 26.4-5
- Red Hat Build Of Keycloak 26.4.6
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
- secalert@redhat.com
- secalert@redhat.com
Frequently asked questions
- What is CVE-2025-13467?
- CVE-2025-13467 is a medium-severity vulnerability in Keycloak, classified under Deserialization of Untrusted Data. CVSS score: 5.5/10. Published 2025-11-25.
- How severe is CVE-2025-13467?
- Medium severity. CVSS v3 base score is 5.5 out of 10.