This improper access control vulnerability in Helpdesk allows attackers to access the system logs. To fix the vulnerability, QNAP recommend updating QTS and Helpdesk to their latest versions.
Cross-site scripting (XSS) vulnerability in QNAP QTS 4.3.3 build 20180126, QTS 4.3.4 build 20180315, and their earlier versions could allow remote attackers to inject arbitrary web script or HTML.