CVE-2026-5718
8.1 HIGHThe Drag and Drop Multiple File Upload for Contact Form 7 plugin for WordPress is vulnerable to arbitrary file upload in versions up to, ...
Published: 2026-04-17 · Last updated: 2026-05-27
Severity and scoring
- CVSS
- 8.1 HIGH
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-434
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).
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-5718
- [Other]https://plugins.trac.wordpress.org/browser/drag-and-drop-multiple-file-upload-contact-form-7/tags/1.3.9.6/inc/dnd-upload-cf7.php#L62
- [Other]https://plugins.trac.wordpress.org/browser/drag-and-drop-multiple-file-upload-contact-form-7/tags/1.3.9.6/inc/dnd-upload-cf7.php#L883
- [Other]https://plugins.trac.wordpress.org/browser/drag-and-drop-multiple-file-upload-contact-form-7/tags/1.3.9.6/inc/dnd-upload-cf7.php#L970
- [Other]https://plugins.trac.wordpress.org/browser/drag-and-drop-multiple-file-upload-contact-form-7/tags/1.3.9.6/inc/dnd-upload-cf7.php#L987
- [Other]https://plugins.trac.wordpress.org/changeset/3508522/drag-and-drop-multiple-file-upload-contact-form-7
- [Other]https://plugins.trac.wordpress.org/changeset/3548901/
- [Other]https://www.wordfence.com/threat-intel/vulnerabilities/id/38f95d40-a6d4-429c-9872-9d2531e942eb?source=cve
Related CVEs
Same CWE
- CVE-2026-40750 — Unrestricted Upload of File with Dangerous Type vulnerability in themagnifico52 Kids Online Store allows Upload a Web Shell to a Web Server (9.9 CRITICAL)
- CVE-2026-6933 — The Premmerce Dev Tools plugin for WordPress is vulnerable to Remote Code Execution via missing authorization in versions up to and inclu... (8.8 HIGH)
- CVE-2026-40772 — Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions (10.0 CRITICAL)
- CVE-2026-39591 — Subscriber Arbitrary File Upload in WP-BusinessDirectory <= 4.0.0 versions (9.9 CRITICAL)
- CVE-2026-39527 — Subscriber Arbitrary File Upload in WpStream < 4.11.2 versions (5.4 MEDIUM)