CVE-2024-3656Public exploitNetwork attack vector

Credential theft via missing admin endpoint authorization

Published Oct 9, 2024 · Updated Nov 20, 2025

Authorization bypass in Keycloak before 24.0.5 and affected Red Hat builds allows remote authenticated users to steal LDAP credentials. The testLDAPConnection admin REST endpoint accepts a user-controlled connectionUrl without requiring realm-management permission and sends the configured LDAP bind credential to that destination. A non-administrative realm account, a configured LDAP provider, and its component identifier are required; other unguarded endpoints also disclose administrative data.

CVSS severity8.1
High
EPSS probability2.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Keycloak before 24.0.5 and affected Red Hat builds allows remote authenticated users to steal LDAP credentials. The testLDAPConnection admin REST endpoint accepts a user-controlled connectionUrl without requiring realm-management permission and sends the configured LDAP bind credential to that destination. A non-administrative realm account, a configured LDAP provider, and its component identifier are required; other unguarded endpoints also disclose administrative data.

The record

CVE
CVE-2024-3656
Published
Oct 9, 2024
Updated
Nov 20, 2025
Vendor
Red Hat
Product
Red Hat build of Keycloak
Classifications
CWE-200, CWE-269, CWE-284
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 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 privilegesauthenticated

What is affected?

Red Hat · Red Hat build of KeycloakAffected versions are unavailable in this record.
Red Hat · Red Hat Single Sign-On 7Affected versions are unavailable in this record.
Keycloak · Keycloakversion=0 <24.0.5

Published CVSS scores

8.1Red Hat, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-269Improper Privilege Management
CWE-284Improper Access Control

Public exploit references

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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