WordPress security changelog
HIGH CVE-2026-5718 Deferred

Drag and Drop Multiple File Upload for Contact Form 7: Dangerous file upload

Drag and Drop Multiple File Upload for Contact Form 7 is affected by dangerous file upload. The vulnerable path is reachable without authentication. Successful exploitation can place attacker-controlled executable content on the server and may lead to full site compromise. The published affected range is <= 1.3.9.7.

CVE / CNA score 8.1 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Drag and Drop Multiple File Upload for Contact Form 7
Plugin slug
drag-and-drop-multiple-file-upload-contact-form-7
Affected
<= 1.3.9.7
Safe version
> 1.3.9.7
Published
Apr 17, 2026
Weakness
CWE-434 — Unrestricted Upload of File with Dangerous Type

This CVE was published Apr 17, 2026 and is one of 18 known issues for this plugin.

What to do

Update, patch or deactivate.

Update Drag and Drop Multiple File Upload for Contact Form 7 to a release after 1.3.9.7, or disable and remove it until a fixed version is available.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Drag and Drop Multiple File Upload for Contact Form 7 plugin for WordPress is vulnerable to arbitrary file upload in versions up to, and including, 1.3.9.7. This is due to insufficient file type validation that occurs when custom blacklist types are configured, which replaces the default dangerous extension denylist instead of merging with it, and the wpcf7_antiscript_file_name() sanitization function being bypassed for filenames containing non-ASCII characters. This makes it possible for unauthenticated attackers to upload arbitrary files, such as PHP files, to the server, which can be leveraged to achieve remote code execution. The vulnerability was originally reported by Leonid Semenenko (lsemenenko) and partially patched in version 1.3.9.7. A bypass for the patch was separately discovered and reported by Nguyen Hung (Mitchell).

CVE / CNA vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Primary and upstream sources