What the vulnerability does
01Description
The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'permission_message' parameter in all versions up to, and including, 6.2.1 due to insufficient input sanitization and output escaping. 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.
Explanation of Vulnerability in Simple Terms
02Summary
Fluent Forms versions 6.2.1 and earlier contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts affecting other users. The vulnerability exists due to insufficient input sanitization in form handling. An attacker with low-level access can craft malicious form data that executes in other users' browsers when they interact with the form.
What an attacker can do
03Attacker Capabilities
Inject JavaScript that runs in other users' browsers to steal data, modify form content, or perform actions on their behalf.
Potential impact on your site
04Site Impact
Authenticated users can compromise other users' sessions or data through malicious form submissions; site reputation and user trust at risk.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the site; no user interaction required from the victim.
Key dates
06Disclosure timeline
May 13, 2026
CVE published
May 13, 2026
Record updated
