CVE-2021-20104: Machform

High severity, CVSS 8.1. EPSS: 2.2% chance of exploitation in the next 30 days.

Machform prior to version 16 is vulnerable to unauthenticated remote code execution due to insufficient sanitization of file attachments uploaded with forms through upload.php.

Affected products

• Machform Machform: before 16 (fixed in 16)

Published 2021-06-29. Last modified 2026-06-17.