Forminator Forms <= 1.57.2.0 - Authenticated (Admin+) PHP Object Injection

6.6
Deserialization of Untrusted Data
CVE CVE-2026-87067
CVSS 6.6 (Medium)
Publicly Published September 18, 2026
Last Updated September 22, 2026
Researcher Karthik Ramakrishnan

Description

The Forminator Forms plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.57.2.0. This is due to deserialization of untrusted input. This makes it possible for authenticated attackers, with admin-level access and above, 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 1.57.2.1, or a newer patched version
Affected Version
  • <= 1.57.2.0
Patched Version
  • 1.57.2.1

Recent vulnerabilities in Forminator Forms – Contact Form, Payment Form & Custom Form Builder

# Title CVE ID CVSS Researchers Date
1 Forminator Forms – Contact Form, Payment Form & Custom Form Builder <= 1.57.3 - Cross-Site Request Forgery CVE-2026-106611 4.3 HOMEVO Adonis Orfel October 8, 2026
2 Forminator Forms – Contact Form, Payment Form & Custom Form Builder <= 1.57.2 - Missing Authorization CVE-2026-96335 5.3 Ananda Dhakal October 2, 2026
3 Forminator Forms <= 1.57.2 - Unauthenticated Stored Cross-Site Scripting via 'postdata-1[post-custom]' Parameter CVE-2026-92144 7.2 Luke Eldridge (system) September 30, 2026
4 Forminator Forms <= 1.57.2 - Unauthenticated Stored Cross-Site Scripting via Rich-Text Textarea Field CVE-2026-85235 7.2 tiborisaak September 30, 2026
5 Forminator Forms <= 1.57.2.0 - Missing Authorization CVE-2026-87069 4.3 Karthik Ramakrishnan September 21, 2026
6 Forminator Forms <= 1.57.2.0 - Missing Authorization CVE-2026-87074 5.3 vuxvinh September 21, 2026
7 Forminator Forms <= 1.57.2.0 - Missing Authorization to Unauthenticated Arbitrary Post Meta Injection CVE-2026-87071 5.3 Dion Mulaj September 21, 2026
8 Forminator Forms <= 1.57.2.0 - Unauthenticated Poll Vote Limit Bypass CVE-2026-87070 5.3 vuxvinh September 21, 2026
9 Forminator Forms <= 1.57.2 - Unauthenticated Arbitrary Shortcode Execution via 'current_url' Parameter CVE-2026-92229 9.1 Kuba September 18, 2026
10 Forminator Forms <= 1.57.2.0 - Authenticated (Admin+) Privilege Escalation CVE-2026-87068 7.2 Karthik Ramakrishnan September 18, 2026

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