What the vulnerability does
01Description
The Fluent Forms plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in all versions up to, and including, 6.1.21. This is due to the SubmissionPolicy class authorizing submission-level actions (read, modify, delete, add notes) based on a user-supplied `form_id` query parameter. This makes it possible for authenticated attackers, with Fluent Forms Manager access restricted to specific forms, to read, modify status, add notes to, and permanently delete form submissions belonging to any other form by spoofing the form_id parameter to a form they are authorized for.
Explanation of Vulnerability in Simple Terms
02Summary
Fluent Forms versions up to 6.1.21 contain an authorization flaw that allows unauthenticated attackers to read sensitive form data over the network. The vulnerability requires no user interaction and can expose confidential information submitted through forms. Site administrators should update to a version newer than 6.1.21 immediately.
What an attacker can do
03Attacker Capabilities
Read sensitive data from form submissions without logging in.
Potential impact on your site
04Site Impact
Form submissions and user data may be exposed to unauthorized access.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
May 14, 2026
CVE published
May 14, 2026
Record updated
