CVE-2026-17571: Fluent Forms <= 6.2.8 - Reflected Cross-Site Scripting via 'param'
The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via 'param' in all versions up to, and including, 6.2.8 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-17571?
CVE-2026-17571 has a medium severity rating of 6.1.
How do I fix CVE-2026-17571?
To fix CVE-2026-17571, upgrade the Fluent Forms plugin to version 6.2.9 or later.
What type of vulnerability is CVE-2026-17571?
CVE-2026-17571 is a Reflected Cross-Site Scripting (XSS) vulnerability.
Which versions of Fluent Forms are affected by CVE-2026-17571?
CVE-2026-17571 affects all versions of Fluent Forms up to and including 6.2.8.
What causes CVE-2026-17571?
CVE-2026-17571 is caused by insufficient input sanitization and output escaping in the Fluent Forms plugin.