The Fluent Forms plugin for WordPress by Fluent Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 5.1.9 due to insufficient input sanitization and output escaping. This makes it possible for attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploitation level depends on who is granted the right to create forms by an administrator. This level can be as low as contributor, but by default is admin.

The Contact Form, Survey & Popup Form Plugin for WordPress plugin before 1.5 does not properly sanitize some of its settings allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed