CVE-2026-16940 Custom Fields for WooCommerce < 1.5.1 - Unauthenticated Arbitrary File Deletion via Path Traversal
Unauthenticated attackers can delete arbitrary files via path traversal, potentially leading to full site takeover.
- 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-2026-16940?
CVE-2026-16940 is a critical path traversal vulnerability in Unknown Custom Fields, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Custom Fields WordPress plugin before 1.5.1 does not validate a user-supplied file path before deletion, allowing unauthenticated users to delete arbitrary files on the server (such as wp-config.php), which can lead to a full site takeover.
Weakness: CWE-22
Which versions are affected by CVE-2026-16940?
How do I fix CVE-2026-16940?
No fix has been published for CVE-2026-16940 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-16940 being exploited?
There is no known exploitation of CVE-2026-16940 in the wild and no public exploit code.
Sources
Also known as GHSA-m93v-54x2-539c.