Exposure of Sensitive Information to an Unauthorized Actor vulnerability in WP Engine Advanced Custom Fields (ACF).This issue affects Advanced Custom Fields (ACF): from 3.1.1 through 6.0.2.
The Advanced Custom Fields (ACF) Free and Pro WordPress plugins 6.x before 6.1.0 and 5.x before 5.12.5 unserialize user controllable data, which could allow users with a role of Contributor and above to perform PHP Object Injection when a suitable gadget is present.