CVE-2025-66923: Opensourcepos Open Source Point Of Sale

High severity, CVSS 7.2. EPSS: 0.6% chance of exploitation in the next 30 days.

A Cross-site scripting (XSS) vulnerability in Create/Update Customer(s) in Open Source Point of Sale v3.4.1 allows remote attackers to inject arbitrary web script or HTML via the phone_number parameter.

Affected products

• Opensourcepos Open Source Point Of Sale: version 3.4.1 only

Published 2025-12-17. Last modified 2026-06-17.