CVE-2025-13467
📋 TL;DR
This vulnerability allows authenticated Keycloak realm administrators to trigger deserialization of untrusted Java objects by configuring a malicious LDAP server. This could lead to remote code execution on the Keycloak server. Only administrators with LDAP configuration privileges are affected.
💻 Affected Systems
- Keycloak
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full compromise of the Keycloak server leading to complete authentication system takeover, credential theft, and lateral movement to connected systems.
Likely Case
Privilege escalation from realm administrator to system-level access, allowing installation of backdoors or data exfiltration.
If Mitigated
Limited to administrative functions with proper access controls and monitoring in place.
🎯 Exploit Status
Requires administrative access and ability to configure LDAP server settings
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Red Hat advisories RHSA-2025:22088 through RHSA-2025:22091 for specific versions
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2025-13467
Restart Required: Yes
Instructions:
1. Review Red Hat advisories for your specific Keycloak version. 2. Apply the appropriate patch or update to the fixed version. 3. Restart Keycloak service. 4. Verify the update was successful.
🔧 Temporary Workarounds
Restrict LDAP Configuration Access
allLimit LDAP User Federation configuration privileges to only essential administrators
Monitor LDAP Configuration Changes
allImplement logging and alerting for any LDAP server configuration modifications
🧯 If You Can't Patch
- Implement strict access controls on Keycloak administrative interfaces
- Monitor and audit all LDAP configuration changes with immediate review
🔍 How to Verify
Check if Vulnerable:
Check Keycloak version against affected versions in Red Hat advisoriesCheck Version:
Check Keycloak server logs or admin console for version informationVerify Fix Applied:
Verify Keycloak version is updated to patched version and restart service📡 Detection & Monitoring
Log Indicators:
- Unusual LDAP configuration changes
- Administrative actions modifying LDAP settings
- Java deserialization errors in logs
Network Indicators:
- Unexpected outbound connections from Keycloak server
- LDAP configuration to unfamiliar servers
SIEM Query:
source="keycloak" AND (event="LDAP_CONFIG_CHANGE" OR message="*deserialization*")🔗 References
- https://access.redhat.com/errata/RHSA-2025:22088
- https://access.redhat.com/errata/RHSA-2025:22089
- https://access.redhat.com/errata/RHSA-2025:22090
- https://access.redhat.com/errata/RHSA-2025:22091
- https://access.redhat.com/security/cve/CVE-2025-13467
- https://bugzilla.redhat.com/show_bug.cgi?id=2416038
- https://github.com/keycloak/keycloak/commit/754c070cf8ca187dcc71f0f72ff3130ff2195328
- https://github.com/keycloak/keycloak/issues/44478
