CVE-2025-13486: Hwk-Fr Advanced Custom Fields: Extended

Critical severity, CVSS 9.8. EPSS: 67.6% chance of exploitation in the next 30 days.

The Advanced Custom Fields: Extended plugin for WordPress is vulnerable to Remote Code Execution in versions 0.9.0.5 through 0.9.1.1 via the prepare_form() function. This is due to the function accepting user input and then passing that through call_user_func_array(). This makes it possible for unauthenticated attackers to execute arbitrary code on the server, which can be leveraged to inject backdoors or create new administrative user accounts.

Affected products

• Hwk-Fr Advanced Custom Fields: Extended: from 0.9.0.5, up to and including 0.9.1.1

Published 2025-12-03. Last modified 2026-06-17.