Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder: A security weakness
Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder is affected by a security weakness. Exploitation requires an authenticated WordPress account. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is <= 6.1.21.
- Component
- Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder
- Plugin slug
fluent-forms- Affected
- <= 6.1.21
- Safe version
> 6.1.21- Published
- May 14, 2026
This CVE was published May 14, 2026 and is one of 4 known issues for this plugin.
Update, patch or deactivate.
Update Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder to a release after 6.1.21, or disable and remove it until a fixed version is available.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N