Unauthenticated PHP Object Injection in Integration for Keap/infusionsoft and Contact Form 7, WPForms, Elementor, Formidable, Ninja Forms <= 1.2.1 versions.
Update the WordPress Integration for Keap/infusionsoft and Contact Form 7, WPForms, Elementor, Formidable, Ninja Forms plugin to the latest available version (at least 1.2.2).