CVE-2026-39440 CRITICAL

CVE-2026-39440: WordPress FunnelFormsPro plugin <= 3.8.1 - Remote Code Execution (RCE) vulnerability

Vendor Funnelforms Llc

Product FunnelFormsPro

Weakness CWE-94 · Code injection

Published April 23, 2026

Last update April 23, 2026

View on NVD All CVEs

CVSS base score

9.9/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Confidentiality High

Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

Improper Control of Generation of Code ('Code Injection') vulnerability in Funnelforms LLC FunnelFormsPro allows Remote Code Inclusion.This issue affects FunnelFormsPro: from n/a through 3.8.1.

Explanation of Vulnerability in Simple Terms

02Summary

FunnelFormsPro versions up to 3.8.1 contain a code injection vulnerability that allows authenticated users with low privileges to run arbitrary PHP code on the site. The vulnerability affects the form processing logic and can impact confidentiality, integrity, and availability of the entire site. Administrators should update to a version newer than 3.8.1 immediately.

What an attacker can do

03Attacker Capabilities

Run arbitrary PHP code on the site with full system access.

Potential impact on your site

04Site Impact

Complete compromise of site data, files, and functionality; attacker can steal data, modify content, or take the site offline.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege user account (e.g., subscriber or contributor role).

Key dates

06Disclosure timeline

April 23, 2026 CVE published

April 23, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-39440 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/94.html AskarLabs — CWE-94 write-up Code Injection

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