---
id: CVE-2025-13748
title: >-
  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'
  paramet…
summary: >-
  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'
  paramet…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-639
published: '2025-12-06'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T20:10:00.197'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-13748'
references:
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3406804/fluentform/tags/6.1.8/app/Modules/Payments/PaymentMethods/Stripe/StripeInlineProcessor.php
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/c2aee799-4e4c-4a41-8b76-e2ad576fe2e2?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00281
epssPercentile: 0.2053
ingestedAt: '2026-10-27T18:12:09.296Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.