Advantech WebAccess Dashboard Viewer renameFolder Directory Traversal Denial of Service Vulnerability

This vulnerability allows remote attackers to deny service to all users on vulnerable installations of Advantech WebAccess. Authentication is not required to exploit this vulnerability. The specific flaw exists within the WebAccess Dashboard Viewer. Insufficient validation within the renameFolder script allows unauthenticated callers to rename key system directories so that access to the functionality of WebAccess is completely blocked to all users.