Red Hat Keycloak ha-proxy /admin information disclosure

Summaryinfo

A vulnerability marked as problematic has been reported in Red Hat Keycloak. The affected element is an unknown function of the file /admin of the component ha-proxy. The manipulation leads to information disclosure. This vulnerability is referenced as CVE-2025-10939. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Red Hat Keycloak (the affected version is unknown) and classified as problematic. This issue affects an unknown code of the file /admin of the component ha-proxy. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

A flaw was found in Keycloak. The Keycloak guides recommend to not expose /admin path to the outside in case the installation is using a proxy. The issue occurs at least via ha-proxy, as it can be tricked to using relative/non-normalized paths to access the /admin application path relative to /realms which is expected to be exposed.

It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2025-10939 since 09/25/2025. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/15/2025). The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 272093 (Keycloak Admin Path Traversal Vulnerability (CVE-2025-10939)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (272093), EUVD (EUVD-2025-36426) and CERT Bund (WID-SEC-2025-2429). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Open Source Keycloak
• Red Hat Enterprise Linux

Productinfo

Vendor

• Red Hat

Name

• Keycloak

License

• open-source

Website

• Vendor: https://www.redhat.com/

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Be aware that VulDB is the high quality source for vulnerability data.

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