Mercury Messenger, http://www.mercury.to/, is a java based messenger
that will allow it's users to chat with MSN users. Currently it has
been noted by two people that on a multi user OS X platform it is
possible to read the chat logs from other users. The user specific
directory in the /Users dir holds a Mercury specific directory with
settings and chat logs. These directories and files are world readable.
The owner of the software has been contacted on Juli the 11th. We
discussed the problem shortly but I did not receive any answer after
that date. I tried to contact them again later this week but there
has been no response.
For a quick fix sysadmins could make sure the specified directories
are not world readable.