Advanced Custom Fields: Extended 0.9.0.5 - 0.9.1.1 - Unauthenticated Remote Code Execution in prepare_form

Improper Control of Generation of Code ('Code Injection')
CVE CVE-2025-13486
CVSS Critical (9.8)
Publicly Published December 2, 2025
Last Updated December 3, 2025
Researcher Marcin Dudek (dudekmar)
Description

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.

References

1 affected software package

Software Type Plugin
Software Slug acf-extended (view on wordpress.org)
Patched? Yes
Affected Version
  • 0.9.0.5 - 0.9.1.1
Patched Version
  • 0.9.2
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