CVE-2024-6311

Funnelforms Free <= 3.7.3.2 - Authenticated (Administrator+) Arbitrary File Upload

2024-08-27 00:00
István Márton

Strategic Overview

Status
Patched in 3.7.4.1
Affected Plugin
Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor – Funnelforms Free
Affected Version
<= 3.7.3.2
CVSS
7.2High
Weakness type
CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE
CVE-2024-6311
View all Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor – Funnelforms Free vulnerabilities

At a glance

CVE-2024-6311 is a high-severity Unrestricted Upload of File with Dangerous Type vulnerability in the Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor WordPress plugin, affecting versions <= 3.7.3.2. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account at Administrator level or above. The issue is fixed in version 3.7.4.1; sites on affected versions should update now. Disclosed August 2024, reported by István Márton.

Vulnerability Overview

The Funnelforms Free plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'af2_add_font' function in all versions up to, and including, 3.7.3.2. This makes it possible for authenticated attackers, with administrator-level and above permissions, to upload arbitrary files on the affected site's server which may make remote code execution possible.

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 interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-434: Unrestricted Upload of File with Dangerous Type

Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor <= 3.7.3.2 carries this weakness at af2_add_font, and reaching it takes an account at Administrator level or above. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.

If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor the fix is 3.7.4.1: builds <= 3.7.3.2 are affected, anything from 3.7.4.1 onward is not.

Remediation

Update to version 3.7.4.1, or a newer patched version

How does WordSec protect against this?

An attacker needs Administrator access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor 3.7.4.1 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2024-6311https://www.wordfence.com/threat-intel/vulnerabilities/id/cbd42fc4-ab4a-4053-b765-18272eacd2bchttps://nvd.nist.gov/vuln/detail/CVE-2024-6311

Related records

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