CVE-2026-87071

Forminator Forms <= 1.57.2.0 - Missing Authorization to Unauthenticated Arbitrary Post Meta Injection

2026-09-21 00:00
Dion Mulaj

Strategic Overview

Status
Patched in 1.57.2.1
Affected Plugin
Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Affected Version
<= 1.57.2.0
CVSS
5.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2026-87071
View all Forminator Forms – Contact Form, Payment Form & Custom Form Builder vulnerabilities

At a glance

CVE-2026-87071 is a medium-severity Missing Authorization vulnerability in the Forminator Forms WordPress plugin, affecting versions <= 1.57.2.0. 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 1.57.2.1; sites on affected versions should update now. Disclosed September 2026, reported by Dion Mulaj.

Vulnerability Overview

The Forminator Forms plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 1.57.2.0. This is due to missing allowlist validation on meta keys supplied by form submissions, which allowed arbitrary and protected meta keys to be written without restriction. This makes it possible for unauthenticated attackers to inject arbitrary post metadata—including WordPress-reserved protected keys—into posts created by form submissions, potentially altering post behaviour or bypassing application logic.

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-862: Missing Authorization

Reaching this weakness in Forminator Forms <= 1.57.2.0 takes no account at all. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Forminator Forms the fix is 1.57.2.1: builds <= 1.57.2.0 are affected, anything from 1.57.2.1 onward is not.

Remediation

Update to version 1.57.2.1, 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: Forminator Forms 1.57.2.1 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-87071https://www.wordfence.com/threat-intel/vulnerabilities/id/7b869c65-5d2c-45d6-b873-0676643af394https://nvd.nist.gov/vuln/detail/CVE-2026-87071

Related records

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