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.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 1
- First seenCVSS 9.8NVD modified 2026-10-13 13:29
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 7
- https://plugins.trac.wordpress.org/browser/extensions-for-cf7/tags/3.4.5/admin/include/class.cf7-signature.php#L222
- https://plugins.trac.wordpress.org/browser/extensions-for-cf7/tags/3.4.5/admin/include/class.cf7-signature.php#L82
- https://plugins.trac.wordpress.org/browser/extensions-for-cf7/tags/3.4.5/includes/class.cf7-extensions.php#L289
- https://plugins.trac.wordpress.org/browser/extensions-for-cf7/tags/3.4.5/includes/class.form-data-store.php#L42
- https://plugins.trac.wordpress.org/changeset/3727009/extensions-for-cf7/trunk/admin/include/class.cf7-signature.php
- 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
- https://www.wordfence.com/threat-intel/vulnerabilities/id/fa3193c4-dd3e-4d9e-be42-769c7358beae?source=cve