Fluent Forms <= 5.1.9 - Authenticated (Contributor+) Stored Cross-Site Scripting

4.9
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2023-6957
CVSS 4.9 (Medium)
Publicly Published March 5, 2024
Last Updated March 13, 2024
Researcher drop

Description

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.

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

References

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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 5.1.10, or a newer patched version
Affected Version
  • <= 5.1.9
Patched Version
  • 5.1.10

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

# Title CVE ID CVSS Researchers Date
1 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
2 Fluent Forms <= 6.2.0 - Authenticated (Subscriber+) Authorization Bypass via 'table' Parameter CVE-2026-5395 8.2 Sander Horsman May 13, 2026
3 Fluent Forms <= 6.1.21 - Authenticated (Subscriber+) Authorization Bypass via 'form_id' Parameter CVE-2026-5396 8.2 Sander Horsman May 13, 2026
4 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
5 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
6 Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder <= 6.1.21 - Insecure Direct Object Reference in Stripe SCA Confirmation to Unauthenticated Payment Status Modification CVE-2026-4160 5.3 Prickly Cactus April 16, 2026
7 Fluent Forms <= 6.1.14 - Authenticated (Subscriber+) Stored Cross-Site Scripting via AI Form Builder Module CVE-2026-0996 6.4 Osvaldo Noe Gonzalez Del Rio (Os) February 9, 2026
8 Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder <= 6.1.14 - Missing Authorization CVE-2026-25313 4.3 benzdeus January 25, 2026
9 FluentForm <= 6.1.11 - Unauthenticated Arbitrary Shortcode Execution CVE-2025-69001 6.5 Kishan Vyas January 13, 2026
10 Fluent Forms <= 6.1.7 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Form Creation via AI Builder CVE-2025-13722 5.3 Marcin Dudek (dudekmar) January 6, 2026

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