GMS-2021-81: Listing of upload directory contents possible

There’s an security issue in prosody-filer versions < 1.0.1 which leads to unwanted directory listings of download directories.

An attacker is able to list previous uploads of a certain user by shortening the URL and accessing a URL subdirectors other than /upload/ (or the corresponding user defined root dir)

Version 1.0.1 and later fix this problem and allow only direct file access if the full path is known. Directory listings are blocked entirely.