Vulnerabilidades do ThemeFusion Avada | Website Builder For WordPress & WooCommerce

The Avada | Website Builder For WordPress & WooCommerce theme for WordPress is vulnerable to Stored Cross-Site Scripting via the user profile 'Author Page' social link contact-method fields (author_facebook, author_twitter, author_linkedin, author_dribble, author_whatsapp, author_email) in versions up to, and including, 7.16.1. Avada registers these fields through the user_contactmethods filter and, on the author archive, emits them inside an anchor href using only esc_attr() in Fusion_Social_Icon::get_markup(), which escapes HTML metacharacters but does not reject dangerous URL schemes such as javascript:. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses their author page and clicks the injected social icon (a click is required, and the site must have 'Open Social Icons in a New Window' set to Off so the browser doesn't block the javascript: URL from opening in a new tab).

The Avada | Website Builder For WordPress & WooCommerce theme for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'lang' parameter in all versions up to, and including, 7.16.1 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. The injected value is propagated through Fusion_Multilingual::set_active_language() and concatenated into a URL by Fusion_Settings::get_setting_link() without applying urlencode(), esc_url(), or esc_attr() before being echoed raw into a double-quoted href attribute in the post editor metabox.