Reported vulnerability

Drag and Drop Multiple File Upload for Contact Form 7 <= 1.3.9.7 - Unauthenticated Arbitrary File Upload via Non-ASCII Filename Blacklist Bypass

Q: Which versions of Drag and Drop Multiple File Upload for Contact Form 7 are affected?

Wordfence lists these affected versions: Start version unspecified, through 1.3.9.7. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for Drag and Drop Multiple File Upload for Contact Form 7?

Wordfence reports a fix for this issue in Drag and Drop Multiple File Upload for Contact Form 7. It lists these fixed versions: 1.3.9.8. Back up your website and test the recommended update before applying it to your live site.

Q: Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Published 17 Apr 2026

Updated 27 May 2026

CVE-2026-5718

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

Does this affect my version?

Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.

Wordfence advisory

high · CVSS 8.1

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).

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

Drag and Drop Multiple File Upload for Contact Form 7

Software: plugin · drag-and-drop-multiple-file-upload-contact-form-7
Affected versions: Start version unspecified, through 1.3.9.7
Fix availability: Fix available
Fixed versions: 1.3.9.8

Recommended action

Update to version 1.3.9.8, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/38f95d40-a6d4-429c-9872-9d2531e942eb?source=api-prod

Data sources and licences

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CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Read licence terms

Source: Wordfence

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Questions about this vulnerability

Which versions of Drag and Drop Multiple File Upload for Contact Form 7 are affected?

Wordfence lists these affected versions: Start version unspecified, through 1.3.9.7. Use the version checker above to compare your installed release with this report.

Is a fix available for Drag and Drop Multiple File Upload for Contact Form 7?

Wordfence reports a fix for this issue in Drag and Drop Multiple File Upload for Contact Form 7. It lists these fixed versions: 1.3.9.8. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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