CVE-2026-18351

CVSS 9.8 (critical) · published 2026-09-10

The Drag and Drop File Upload for Elementor Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.6.0 via the elementor_file_upload function. This is due to insufficient file type validation in the is_file_type_valid() function, which uses the attacker-controlled 'type' parameter as regex keys in the MIME allowlist, allowing blacklist bypass via a crafted extension that sanitize_file_name() later normalizes to a PHP extension. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.

Weakness: CWE-434

Source: NVD CVE-2026-18351

References

• https://plugins.svn.wordpress.org/drag-and-drop-file-upload-for-elementor-forms/tags/1.6.0/drag-and-drop-file-upload-for-elementor-forms.php
• https://plugins.svn.wordpress.org/drag-and-drop-file-upload-for-elementor-forms/tags/1.6.0/fields/file_upload.php
• https://plugins.trac.wordpress.org/browser/drag-and-drop-file-upload-for-elementor-forms/tags/1.6.0/fields/file_upload.php#L833
• https://plugins.trac.wordpress.org/changeset/3628051/drag-and-drop-file-upload-for-elementor-forms
• https://www.wordfence.com/threat-intel/vulnerabilities/id/03e853be-510f-4957-a227-17ca9f825b12?source=cve

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