Unauthenticated PHP Object Injection in WP Zendesk for Contact Form 7, WPForms, Elementor, Formidable and Ninja Forms <= 1.1.4 versions.
Update the WordPress WP Zendesk for Contact Form 7, WPForms, Elementor, Formidable and Ninja Forms plugin to the latest available version (at least 1.1.5).