Forminator Forms – Contact Form, Payment Form & Custom Form Builder <= 1.57.0 - Unauthenticated PHP Object Injection
| CVE | CVE-2026-66583 |
|---|---|
| CVSS | 8.1 (High) |
| Publicly Published | August 19, 2026 |
| Last Updated | August 24, 2026 |
| Researcher |
Ahmed Hassan
|
Description
The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.57.0. This is due to deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.
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Vulnerability Details for Forminator Forms – Contact Form, Payment Form & Custom Form Builder
| Software Type | Plugin |
|---|---|
| Software Slug | forminator (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 1.57.1, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Forminator Forms – Contact Form, Payment Form & Custom Form Builder
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