C'est une vulnérabilité de sévérité moyenne, à corriger dans le cadre de la maintenance normale du site.
Cette faille affecte Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI, un plugin WordPress, dans les versions < 3.6.3. Le correctif est disponible en version 3.6.3.
Description technique (source WPVulnerability.net) : « The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'evf_toast_type' parameter in all versions up to, and including, 3.6.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Exploitation requires the sibling evf_toast parameter to decode successfully via atob(), but this is a trivially attacker-controlled prerequisite. »
Comment savoir si je suis touché ?
La seule manière fiable de savoir si votre site est concerné est de vérifier la version de Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI réellement installée. ScanMonSite automatise ce contrôle à distance, en lecture seule, gratuitement.