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 at least subscriber-level access. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is <= 6.2.1.
- Component
- Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder
- Plugin slug
fluent-forms- Affected
- <= 6.2.1
- Safe version
> 6.2.1- Published
- Jul 10, 2026
This CVE was published Jul 10, 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 6.2.1, 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 incorrect authorization via the 'subscription_id' parameter in versions up to, and including, 6.2.1. This is due to insufficient ownership authorization checks in the payment cancellation AJAX flow. This makes it possible for authenticated attackers, with subscriber-level access and above, to submit cancellation requests for other users' subscriptions.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L