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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (35.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
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
- access.redhat.com/errata/RHSA-2025:22088 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:22089 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:22090 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:22091 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2025-13467 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- github.com/keycloak/keycloak/commit/754c070cf8ca187dcc71f0f72ff3130ff2195328
- github.com/keycloak/keycloak/issues/44478
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.