CVE-2026-5718 File upload in Drag and Drop Multiple File Upload for Contact Form 7
Unauthenticated attackers can upload arbitrary files to achieve remote code execution by bypassing filename sanitization in this WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5718?
CVE-2026-5718 is a high-severity vulnerability in glenwpcoder Drag and Drop Multiple File Upload for Contact Form 7, published on 17 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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).
Weakness: CWE-434
Which versions are affected by CVE-2026-5718?
How do I fix CVE-2026-5718?
No fix has been published for CVE-2026-5718 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-5718 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5718 exists.
Public exploit code: 1 Nuclei template and 4 proofs of concept on GitHub.
Sources
Also known as GHSA-xj7v-jqv6-v48w.