CVE-2026-94589

Impact

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.

Affected packages

This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.

Weakness classification

References

• NVD record
• CVE.org record
• 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