CVE-2026-16940 — CRITICAL (10.0)

Vulnerability 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.

CVSS Score

10.0

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-22

References

https://wpscan.com/vulnerability/a315a6ac-3ffb-4735-92ca-6e85338f8807/

FAQ

What is CVE-2026-16940?

CVE-2026-16940 is a vulnerability with a CVSS score of 10.0 (CRITICAL). 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.p...

How severe is CVE-2026-16940?

CVE-2026-16940 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-16940?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.