CVE-2026-106166

NEX-Forms – Ultimate Forms Plugin for WordPress 9.2.1 - 9.3.0 - Unauthenticated Insecure Direct Object Reference

2026-10-14 00:00

Strategic Overview

Status: Patched in 9.3.1
Affected Plugin: NEX-Forms – Ultimate Forms Plugin for WordPress
Affected Version: 9.2.1 – 9.3.0
CVSS: 5.3Medium
Weakness type: CWE-639 · Authorization Bypass Through User-Controlled Key
CVE: CVE-2026-106166

View all NEX-Forms – Ultimate Forms Plugin for WordPress vulnerabilities

At a glance

CVE-2026-106166 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the NEX-Forms WordPress plugin, affecting versions 9.2.1 – 9.3.0. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 9.3.1; sites on affected versions should update now. Disclosed October 2026, reported by Farid Narimanov.

Vulnerability Overview

The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions 9.2.1 through 9.3.0. This is due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to perform an unauthorized action.

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.

CWE-639: Authorization Bypass Through User-Controlled Key

Reaching this weakness in NEX-Forms 9.2.1 – 9.3.0 takes no account at all. 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 NEX-Forms the fix is 9.3.1: builds 9.2.1 – 9.3.0 are affected, anything from 9.3.1 onward is not.

Remediation

Update to version 9.3.1, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: NEX-Forms 9.3.1 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-106166 https://www.wordfence.com/threat-intel/vulnerabilities/id/13c2b6d2-29d6-4193-80f6-87be0d64968f https://nvd.nist.gov/vuln/detail/CVE-2026-106166

Related records

Same weakness class

7.5CVE-2026-1947: NEX-Forms Unauthenticated Arbitrary Form EntryCVE-2026-1947

Other vulnerabilities in NEX-Forms – Ultimate Forms Plugin for WordPress

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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