The WordPress plugin Advanced Custom Fields (ACF) version 3.5.1 and below contains a remote file inclusion (RFI) vulnerability in core/actions/export.php. When the PHP configuration directive allow_url_include is enabled (default: Off), an unauthenticated attacker can exploit the acf_abspath POST parameter to include and execute arbitrary remote PHP code. This leads to remote code execution under the web server’s context, allowing full compromise of the host.
The PHP application receives input from an upstream component, but it does not restrict or incorrectly restricts the input before its usage in "require," "include," or similar functions.