Authorization Flaw in NEX-Forms WordPress Plugin Allows Unauthorized Modification of Form Entries
CVE-2026-106166

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Nex-forms
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-106166?

The NEX-Forms plugin for WordPress versions prior to 9.3.1 has a significant authorization flaw, lacking essential checks for validating user ownership and requests when updating stored form entries. This vulnerability enables unauthenticated attackers to exploit the system by modifying, deleting, or appending data to existing form submissions simply by utilizing the corresponding sequential identifier. Without stringent authorization, the integrity of submitted data is compromised, posing a serious risk to form data security.

Affected Version(s)

NEX-Forms 9.2.1 < 9.3.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-106166 - Proof of Concept

References

https://wpscan.com/vulnerability/aa33ce05-091d-4fef-b875-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Farid Narimanov
WPScan
.