SB2025112714 - Deserialization of untrusted data in Keycloak LDAP User Federation provider
Published: November 27, 2025 Updated: December 19, 2025
Security Bulletin ID
SB2025112714
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Deserialization of Untrusted Data (CVE-ID: CVE-2025-13467)
CWE-ID: CWE-502 - Deserialization of Untrusted Data
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to compromise the affected system.
The vulnerability exists due to insecure input validation when processing serialized data in the Keycloak LDAP User Federation provider. A remote privileged user can create a malicious LDAP server configuration and execute arbitrary code on the target system.
Remediation
Install update from vendor's website.