The vulnerability of the AppManagementController.appUpgradeAction() function in the software for remote monitoring with virtual private network capabilities from Advantech WebAccess/VPN allows a hacker to execute arbitrary commands on behalf of the web server user (www-data).

The vulnerability of the AppManagementController.appUpgradeAction function in software for remote monitoring with Advantech WebAccess/VPN virtual private network capabilities exists due to the failure to address the issues related to special elements used in the operating system command set...