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

2025-12-05 18:10

Md. Moniruzzaman Prodhan (NomanProdhan)

Strategic Overview

Status

Patched in 6.1.8

Affected PluginFluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder

Affected Version<= 6.1.7

CVSS5.3Medium

CVECVE-2025-13748

View all Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder vulnerabilities

Vulnerability 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.

Technical Analysis

REMEDIATION: Update to version 6.1.8, or a newer patched version --- IDENTIFIER: CWE-639 (Authorization Bypass Through User-Controlled Key) The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

External References

https://www.cve.org/CVERecord?id=CVE-2025-13748 https://www.wordfence.com/threat-intel/vulnerabilities/id/c2aee799-4e4c-4a41-8b76-e2ad576fe2e2

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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