What the vulnerability does
01Description
The Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor – Funnelforms Free plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.7.5.1 via deserialization of untrusted input. This makes it possible for authenticated attackers, with Contributor-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.
Explanation of Vulnerability in Simple Terms
02Summary
Funnelforms Free versions up to 3.7.5.1 contain a deserialization vulnerability that allows authenticated users to execute arbitrary code on the site. An attacker with low-level access can craft malicious serialized data to trigger code execution. This affects the form builder's data handling and requires an active user account to exploit.
What an attacker can do
03Attacker Capabilities
Run their own code on the site with full access to the database and files.
Potential impact on your site
04Site Impact
A compromised user account can lead to complete site takeover, data theft, or malware installation.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account (e.g., subscriber or contributor role).
Key dates
06Disclosure timeline
December 4, 2024
CVE published
April 8, 2026
Record updated
