Fluent Forms Plugin up to 6.1.7 on WordPress confirmScaPayment submission_id resource injection

Summaryinfo

A vulnerability described as problematic has been identified in Fluent Forms Plugin up to 6.1.7 on WordPress. This affects the function confirmScaPayment. The manipulation of the argument submission_id results in resource injection. This vulnerability is cataloged as CVE-2025-13748. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in Fluent Forms Plugin up to 6.1.7 on WordPress. Affected is the function confirmScaPayment. The manipulation of the argument submission_id with an unknown input leads to a resource injection vulnerability. CWE is classifying the issue as CWE-99. The product receives input from an upstream component, but it does not restrict or incorrectly restricts the input before it is used as an identifier for a resource that may be outside the intended sphere of control. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2025-13748. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/07/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-201540). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Name

• Fluent Forms Plugin

Version

• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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