CVE-2026-18781 File upload in Drag and Drop Multiple File Upload for Contact Form 7
Unauthenticated attackers can upload malicious files with control characters to bypass restrictions and execute arbitrary code on the server.
- 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-2026-18781?
CVE-2026-18781 is a high-severity vulnerability in Unknown Drag and Drop Multiple File Upload for Contact Form 7, published on 21 Aug 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 WordPress plugin before 1.3.9.9 does not validate the final name of an uploaded file after stripping characters from it, allowing unauthenticated users to defeat its file type restrictions and execute arbitrary code on the server.
Weakness: CWE-94
Which versions are affected by CVE-2026-18781?
How do I fix CVE-2026-18781?
No fix has been published for CVE-2026-18781 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18781 being exploited?
There is no known exploitation of CVE-2026-18781 in the wild and no public exploit code.
Sources
Also known as GHSA-rf4c-mm92-mpjf.