CVE-2026-5395

Fluent Forms <= 6.2.0 - Authenticated (Subscriber+) Authorization Bypass via 'table' Parameter

2026-05-13 18:08
Sander Horsman

Strategic Overview

Status
Patched in 6.2.1
Affected Plugin
Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder
Affected Version
<= 6.2.0
CVSS
8.2High
Weakness type
CWE-639 · Authorization Bypass Through User-Controlled Key
CVE
CVE-2026-5395
View all Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder vulnerabilities

At a glance

CVE-2026-5395 is a high-severity Authorization Bypass Through User-Controlled Key vulnerability in the Fluent Forms WordPress plugin, affecting versions <= 6.2.0. It carries a CVSS score of 8.2 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires no authentication. The issue is fixed in version 6.2.1; sites on affected versions should update now. Disclosed May 2026, reported by Sander Horsman.

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, 6.2.0 via the exportEntries function due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Fluent Forms manager-level access and above, to bypass form-level access restrictions to access submissions from forms they are not authorized to view, export data from arbitrary database tables, and enumerate database table names via error message disclosure.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-639: Authorization Bypass Through User-Controlled Key

Reaching this weakness in Fluent Forms <= 6.2.0 takes an account at Subscriber level or above. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For Fluent Forms the fix is 6.2.1: builds <= 6.2.0 are affected, anything from 6.2.1 onward is not.

Remediation

Update to version 6.2.1, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Fluent Forms 6.2.1 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-5395https://www.wordfence.com/threat-intel/vulnerabilities/id/9cd12b8a-2033-4236-abcd-2a8d08e7f099https://nvd.nist.gov/vuln/detail/CVE-2026-5395

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C