Fluent Forms <= 6.2.0 - Insecure Direct Object Reference to Authenticated (Subscriber+) Subscription Cancellation
| CVE | CVE-2026-11880 |
|---|---|
| CVSS | 4.3 (Medium) |
| Publicly Published | August 10, 2026 |
| Last Updated | August 21, 2026 |
| Researcher |
Pedro Pinho
|
Description
The Fluent Forms plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 6.2.0. This is due to missing ownership validation on the subscription_id parameter in the cancel_subscription AJAX route, allowing any authenticated user to cancel subscriptions tied to forms they do not manage. This makes it possible for authenticated attackers, with subscriber-level access and above, to cancel arbitrary payment subscriptions belonging to other users by supplying a foreign subscription_id.
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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 6.2.1, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder
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