Insufficient escaping of whitespace in FTP user paths
Under "Web pages" => "Web access" => "FTP user" => Edit or create new => "Options" => "Directory
If you store e.g. /var/www/clients/client23/web167/ /root/TEST the folder TEST with the user rights of the FTP account will be created in /root/. What is even worse is that the permissions of existing folders are overwritten.
Scope: A valid client login with active website module and the permission to add FTP users in client limits is required to access the FTP user path setting.
Note: The original report has been translated to English by ISPConfig developers and the scope information has been added.