What the vulnerability does
01Description
The Fluent Forms Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `fluentform_step_form_save_data` AJAX action in all versions up to, and including, 6.1.17. This is due to the draft form submission endpoint being publicly accessible without authentication or nonce verification, combined with insufficient input sanitization and output escaping of form field data. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator views a partial form entry.
Explanation of Vulnerability in Simple Terms
02Summary
Fluent Forms Pro Add On Pack versions up to 6.1.17 contain a cross-site scripting (XSS) vulnerability that allows unauthenticated attackers to inject malicious scripts. The vulnerability affects the site's scope, meaning injected code can impact other users and site functionality. No user interaction is required for exploitation.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that executes in other users' browsers and affects site functionality.
Potential impact on your site
04Site Impact
Visitors and admins may have malicious scripts run in their browsers, risking credential theft, session hijacking, or site defacement.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
March 5, 2026
CVE published
April 8, 2026
Record updated
