CVE-2025-13467 is a medium-severity (CVSS 5.5) Deserialization of Untrusted Data vulnerability in org.keycloak:keycloak-ldap-federation. A fix is available for org.keycloak:keycloak-ldap-federation — see the affected versions and patch details below.
Org.keycloak.storage.ldap: keycloak: deserialization of untrusted data in ldap user federation
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2025-13467.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2025-13467 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,238 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
org.keycloak:keycloak-ldap-federation☕org.keycloak:keycloak-ldap-federationReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.keycloak:keycloak-ldap-federation | ≥ 26.3.0&&< 26.4.6 | 26.4.6org.keycloak:keycloak-ldap-federation:26.4.6 |
| ☕Maven | org.keycloak:keycloak-ldap-federation | all versions | 26.2.11org.keycloak:keycloak-ldap-federation:26.2.11 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.keycloak:keycloak-ldap-federation, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.keycloak:keycloak-ldap-federation to 26.4.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-13467 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2025-13467 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2025-13467. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat build of Keycloak 26.2 | rhbk/keycloak-operator-bundle:26.2.11-1 | RHSA-2025:22088 |
| Red Hat build of Keycloak 26.2.11 | keycloak | RHSA-2025:22089 |
| Red Hat build of Keycloak 26.4 | rhbk/keycloak-operator-bundle:26.4.6-1 | RHSA-2025:22090 |
| Red Hat build of Keycloak 26.4.6 | keycloak | RHSA-2025:22091 |
Frequently Asked Questions
Is CVE-2025-13467 in your dependencies?
O3 Security finds CVE-2025-13467 across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.