Command injection vulnerability in Helpdesk versions 1.1.21 and earlier in QNAP QTS 4.2.6 build 20180531, QTS 4.3.3 build 20180528, QTS 4.3.4 build 20180528 and their earlier versions could allow remote attackers to run arbitrary commands in the compromised application.
Cross-site scripting (XSS) vulnerability in App Center in QNAP QTS 4.2.6 build 20171208, QTS 4.3.3 build 20171213, QTS 4.3.4 build 20171223, and their earlier versions could allow remote attackers to inject Javascript code.
Command injection vulnerability in LDAP Server in QNAP QTS 4.2.6 build 20171208, QTS 4.3.3 build 20180402, QTS 4.3.4 build 20180413 and their earlier versions could allow remote attackers to run arbitrary commands or install malware on the NAS.
QNAP has already patched this vulnerability. This security concern allows a remote attacker to run arbitrary commands on the QNAP Video Station 5.1.3 (for QTS 4.3.3), 5.2.0 (for QTS 4.3.4), and earlier.