CVE-2025-13467Network attack vector

Untrusted Java object instantiation via LDAP referrals

Published Nov 25, 2025 · Updated Nov 25, 2025

Deserialization in Red Hat build of Keycloak allows remote authenticated users with realm-admin rights to instantiate untrusted Java objects. The LDAP User Federation provider follows a malicious server's non-LDAP referral to an RMI endpoint and lets JNDI materialize an untrusted Java object during user synchronization. Exploitation requires realm-admin access, control of the configured LDAP server, referral following, and a triggered user sync; published sources do not specify the resulting object behavior.

CVSS severity5.5
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in Red Hat build of Keycloak allows remote authenticated users with realm-admin rights to instantiate untrusted Java objects. The LDAP User Federation provider follows a malicious server's non-LDAP referral to an RMI endpoint and lets JNDI materialize an untrusted Java object during user synchronization. Exploitation requires realm-admin access, control of the configured LDAP server, referral following, and a triggered user sync; published sources do not specify the resulting object behavior.

The record

CVE
CVE-2025-13467
Published
Nov 25, 2025
Updated
Nov 25, 2025
Vendor
389 Directory Server
Product
Red Hat build of Keycloak
Classifications
CWE-502
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

389 Directory Server · Red Hat build of KeycloakAffected versions are unavailable in this record.

Published CVSS scores

5.5Red HatCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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