Fluent Forms <= 6.1.14 - Authenticated (Subscriber+) Stored Cross-Site Scripting via AI Form Builder Module

6.4
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2026-0996
CVSS 6.4 (Medium)
Publicly Published February 9, 2026
Last Updated February 10, 2026
Researcher Osvaldo Noe Gonzalez Del Rio (Os) - krei.dev | ogbuilders.io

Description

The Fluent Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the AI Form Builder module in all versions up to, and including, 6.1.14 due to a combination of missing authorization checks, a leaked nonce, and insufficient input sanitization. The vulnerability allows Subscriber-level users to trigger AI form generation via a protected endpoint. When prompted, AI services will typically return bare JavaScript code (without <script> tags), which bypasses the plugin's sanitization. This stored JavaScript executes whenever anyone views the generated form, making it possible for authenticated attackers with Subscriber-level access and above to inject arbitrary web scripts that will execute in the context of any user accessing the form.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

References

Share

Vulnerability Details for Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder

Software Type Plugin
Software Slug fluentform (view on wordpress.org)
Patched? Yes
Remediation Update to version 6.1.15, or a newer patched version
Affected Version
  • <= 6.1.14
Patched Version
  • 6.1.15

Recent vulnerabilities in Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder

# Title CVE ID CVSS Researchers Date
1 Fluent Forms <= 6.2.11 - Unauthenticated Stored Cross-Site Scripting via Notification Smartcode Values CVE-2026-18146 7.2 Adrien Brunner August 12, 2026
2 Fluent Forms <= 6.2.8 - Reflected Cross-Site Scripting via 'param' CVE-2026-17571 6.1 Osvaldo Noe Gonzalez Del Rio (Os) July 31, 2026
3 Fluent Forms <= 6.2.8 - Unauthenticated Sensitive Information Exposure via Insecure Direct Object Reference and Weak Transaction Hash in 'transaction' Parameter CVE-2026-17567 5.3 ChinhNguyen July 30, 2026
4 Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder < 6.2.6 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2026-11881 6.4 Muni Nitish Kumar Yaddala July 30, 2026
5 Fluent Forms <= 6.2.7 - Unauthenticated Stored Cross-Site Scripting via Name Field Nested `password` Member CVE-2026-16655 7.2 daroo July 28, 2026
6 Fluent Forms <= 6.2.1 - Incorrect Authorization to Authenticated (Subscriber+) Arbitrary Subscription Cancellation via 'subscription_id' CVE-2026-5069 5.4 Fernando Mecozzi July 9, 2026
7 Fluent Forms <= 6.2.0 - Authenticated (Subscriber+) Authorization Bypass via 'table' Parameter CVE-2026-5395 8.2 Sander Horsman May 13, 2026
8 Fluent Forms <= 6.1.21 - Authenticated (Subscriber+) Authorization Bypass via 'form_id' Parameter CVE-2026-5396 8.2 Sander Horsman May 13, 2026
9 Fluent Forms <= 6.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'permission_message' Shortcode Attribute CVE-2026-6828 6.4 zaim May 12, 2026
10 Fluent Forms <= 6.2.1 - Authenticated (Administrator+) Arbitrary File Read via Path Traversal in Email Attachment CVE-2026-6344 4.9 Niv Kochan May 5, 2026

Did you know Wordfence Intelligence provides free personal and commercial API access to our comprehensive WordPress vulnerability database, along with a free webhook integration to stay on top of the latest vulnerabilities added and updated in the database? Get started today!

Learn more

Want to get notified of the latest vulnerabilities that may affect your WordPress site?
Install Wordfence on your site today to get notified immediately if your site is affected by a vulnerability that has been added to our database.

Get Wordfence

The Wordfence Intelligence WordPress vulnerability database is completely free to access and query via API. Please review the documentation on how to access and consume the vulnerability data via API.

Documentation