Snapchat has proved that the new order of things is privacy breach, followed by billions. Slack, a popular service loved (by most) at Gawker Media, is seeking a $1 billion valuation the same week we found out you could peer into your competitor's chat rooms.

Few pieces of corporate software have earned so many fans so quickly as Slack, which is basically a sophisticated chat room for businesses. But as one blogger just realized, a vulnerability in the login page lets you snoop on the other guy.