CVE-2023-28824: Contec Conprosys HMI System

Medium severity, CVSS 4.9. EPSS: 0.6% chance of exploitation in the next 30 days.

Server-side request forgery vulnerability exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. A user who can access the affected product with an administrative privilege may bypass the database restriction set on the query setting page, and connect to a user unintended database.

Affected products

• Contec Conprosys HMI System: before 3.5.3 (fixed in 3.5.3)

Published 2023-06-01. Last modified 2026-06-17.