CVE-2021-43657: Simple Client Management System Project Simple Client Management System

Medium severity, CVSS 5.4. EPSS: 0.7% chance of exploitation in the next 30 days.

A Stored Cross-site scripting (XSS) vulnerability via MAster.php in Sourcecodetester Simple Client Management System (SCMS) 1.0 allows remote attackers to inject arbitrary web script or HTML via the vulnerable input fields.

Affected products

• Simple Client Management System Project Simple Client Management System: version 1.0 only

Published 2022-12-22. Last modified 2026-06-17.