Fluent Forms <= 6.1.7 - Unauthenticated Insecure Direct Object Reference to Payment Status Tampering via submission_id

Authorization Bypass Through User-Controlled Key
CVE CVE-2025-13748
CVSS Medium (5.3)
Publicly Published December 5, 2025
Last Updated December 6, 2025
Researcher Md. Moniruzzaman Prodhan (NomanProdhan)
Description

The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 6.1.7 via the 'submission_id' parameter due to missing validation on a user controlled key within the confirmScaPayment() function. This makes it possible for unauthenticated attackers to mark arbitrary submissions as failed via crafted requests to the endpoint granted they can guess or enumerate a valid submission identifier.

References

1 affected software package

Software Type Plugin
Software Slug fluentform (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 6.1.7
Patched Version
  • 6.1.8
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