Not sure if this is a unraid or Unassigned Devices problem, but I just tried to browse a hdd mounted by UD, from the main page in unraid 6.7.0-rc1, I found the folders I expected, text files, when clicking the files it allowed me to download them, then I found a php file and clicked it, but instead of downloading or showing me the content, it got executed.
Could that not lead to some problems, if an unexpected file got executed inside unraid?