The Easy Form Builder – WordPress plugin form builder: contact form, survey form, payment form, and custom form builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'name' parameter of the 'add_form_Emsfb' AJAX action in all versions up to, and including, 3.8.8 due to insufficient input sanitization and output escaping and missing authorization checks. 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 an injected page.

Missing Authorization vulnerability in Porthas Inc. Contact Form, Survey & Form Builder – MightyForms allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Contact Form, Survey & Form Builder – MightyForms: from n/a through 1.3.9.

The Contact Form, Survey & Form Builder – MightyForms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'mightyforms' shortcode in all versions up to, and including, 1.3.9 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Formidable Forms – Contact Form Plugin, Survey, Quiz, Payment, Calculator Form & Custom Form Builder plugin for WordPress is vulnerable to POST-Based Reflected Cross-Site Scripting via the Custom HTML Form parameters in all versions up to, and including, 6.16.1.2 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.

The Freemius SDK, as used by hundreds of WordPress plugin and theme developers, was vulnerable to Cross-Site Request Forgery and Information disclosure due to missing capability checks and nonce protection on the _get_debug_log, _get_db_option, and the _set_db_option functions in versions up to, and including 2.4.2. Any WordPress plugin or theme running a version of Freemius less than 2.4.3 is vulnerable.

The Formidable Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple parameters submitted during form entries like 'after_html' in versions before 2.05.03 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute in a victim's browser.

The Metform Elementor Contact Form Builder for WordPress is vulnerable to Arbitrary File Upload due to insufficient file type validation in versions up to, and including, 3.2.4. This allows unauthenticated visitors to perform a "double extension" attack and upload files containing a malicious extension but ending with a benign extension, which may make remote code execution possible in some configurations.

The MetForm – Contact Form, Survey, Quiz, & Custom Form Builder for Elementor plugin for WordPress is vulnerable to Sensitive Information Exposure in versions up to, and including, 3.8.8 via the 'handle_file' function. This can allow unauthenticated attackers to extract sensitive data, such as Personally Identifiable Information, from files uploaded by users.

The Contact Form, Survey & Popup Form Plugin for WordPress – ARForms Form Builder plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the 'arflite_remove_preview_data' function in all versions up to, and including, 1.6.4. This makes it possible for authenticated attackers, with subscriber access and above, to delete arbitrary site options, resulting in loss of availability.

The Metform Elementor Contact Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's widgets in all versions up to, and including, 3.8.5 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.