The gist of it: the slack mac client seems to ask you for your groups before properly authenticating you - hence if you put in the email address of a competitor (or famous person), you can see which groups they belong to, which might be valuable information.
(haven't tried it myself, just summarising the post)
Here is a cached version [1]
The gist of it: the slack mac client seems to ask you for your groups before properly authenticating you - hence if you put in the email address of a competitor (or famous person), you can see which groups they belong to, which might be valuable information.
(haven't tried it myself, just summarising the post)
[1] http://cc.bingj.com/cache.aspx?q=http%3a%2f%2fwww.tanay.co.i...