Advanced Custom Fields (ACF®) < 6.7.1 - Unauthenticated Arbitrary Post/Page Disclosure via AJAX Field Query Parameters

Description

The plugin is vulnerable to Missing Authorization to Arbitrary Post/Page Disclosure due to AJAX field query endpoints accepting user-supplied filter parameters that override field-configured restrictions without proper authorization checks. This makes it possible for unauthenticated attackers with access to a frontend ACF form to enumerate and disclose information about draft/private posts, restricted post types, and other data that should be restricted by field configuration.