Contact Form Plugin by Fluent Forms for Quiz, Survey, and Drag & Drop WP Form Builder <= 5.1.16 - Missing Authorization to Settings Update and Limited Privilege Escalation

9.8
Missing Authorization
CVE CVE-2024-2771
CVSS 9.8 (Critical)
Publicly Published May 17, 2024
Last Updated May 18, 2024
Researcher Tobias Weißhaar (kun_19)

Description

The Contact Form Plugin by Fluent Forms for Quiz, Survey, and Drag & Drop WP Form Builder plugin for WordPress is vulnerable to privilege escalation due to a missing capability check on the /wp-json/fluentform/v1/managers REST API endpoint in all versions up to, and including, 5.1.16. This makes it possible for unauthenticated attackers to grant users with Fluent Form management permissions which gives them access to all of the plugin's settings and features. This also makes it possible for unauthenticated attackers to delete manager accounts.

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 5.1.17, or a newer patched version
Affected Version
  • <= 5.1.16
Patched Version
  • 5.1.17

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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