---
id: CVE-2026-94589
title: >-
  The Extensions For CF7 (Contact form 7 Database, Conditional Fields and
  Redirection) plugin for WordPress is vulnerable to Arbitrary File Upload in
  all versions up to, and including, 3.4.5 via the extcf7_submit function
summary: >-
  The Extensions For CF7 (Contact form 7 Database, Conditional Fields and
  Redirection) plugin for WordPress is vulnerable to Arbitrary File Upload in
  all versions up to, and including, 3.4.5 via the extcf7_submit function. This
  is due to m…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-434
published: '2026-10-10'
updated: '2026-10-10'
sourceUpdated: '2026-10-10T04:18:19.713'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94589'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/extensions-for-cf7/tags/3.4.5/admin/include/class.cf7-signature.php#L222
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/extensions-for-cf7/tags/3.4.5/admin/include/class.cf7-signature.php#L82
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/extensions-for-cf7/tags/3.4.5/includes/class.cf7-extensions.php#L289
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/extensions-for-cf7/tags/3.4.5/includes/class.form-data-store.php#L42
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3727009/extensions-for-cf7/trunk/admin/include/class.cf7-signature.php
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&new=3727009%40extensions-for-cf7%2Ftags%2F3.4.6&old=3672142%40extensions-for-cf7%2Ftags%2F3.4.5
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/fa3193c4-dd3e-4d9e-be42-769c7358beae?source=cve
    label: security@wordfence.com
tags:
  - nvd
ingestedAt: '2026-10-10T04:21:57.824Z'
---

## Overview

The Extensions For CF7 (Contact form 7 Database, Conditional Fields and Redirection) plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 3.4.5 via the extcf7_submit function. This is due to missing file extension, MIME type, and size validation in the signature field's validation_filter(), combined with the absence of PHP-execution guards in the upload directory and a sanitize_file_name() bypass that converts shell.php- into shell.php. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.