CVE-2025-11538

Description

A vulnerability exists in Keycloak's server distribution where enabling debug mode (--debug <port>) insecurely defaults to binding the Java Debug Wire Protocol (JDWP) port to all network interfaces (0.0.0.0). This exposes the debug port to the local network, allowing an attacker on the same network segment to attach a remote debugger and achieve remote code execution within the Keycloak Java virtual machine.

CVSS v3.1 Score

6.8

MEDIUM

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness Type (CWE)

CWE-1327 CWE-1327

References

Other References

https://access.redhat.com/errata/RHSA-2025:21370 https://access.redhat.com/errata/RHSA-2025:21371 https://access.redhat.com/security/cve/CVE-2025-11538 https://bugzilla.redhat.com/show_bug.cgi?id=2402622 https://github.com/keycloak/keycloak/commit/9e98f2bf961f68853cea6fbec58b512ed8be7ca9 https://github.com/keycloak/keycloak/pull/43574

Frequently Asked Questions

What is CVE-2025-11538? +

A vulnerability exists in Keycloak's server distribution where enabling debug mode (--debug <port>) insecurely defaults to binding the Java Debug Wire Protocol (JDWP) port to all network interfaces (0.0.0.0). This exposes the debug port to the local network, allowing an attacker on the same network segment to attach a remote debugger and achieve remote code execution within the Keycloak Java virtual machine. It has a CVSS v3.1 base score of 6.8 (MEDIUM).

How severe is CVE-2025-11538? +

CVE-2025-11538 has a CVSS v3.1 score of 6.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-11538? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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