The BBC is reporting that the email addresses of LinkedIn users can be exposed via a web browser add on. A LinkedIn spokesman told the BBC "We are doing everything we can to shut Sell Hack down. On 31 March LinkedIn's legal team delivered Sell Hack a cease-and-desist letter as a result of several violations"
NCommander adds: Sell Hack is a plugin for Chrome that allows you to retrieve emails from LinkedIn itself. The article goes on to say that Sell Hack is complying with the cease and desist, but actual details remain somewhat light. If anyone is familiar with the inner works of this plugin, I'll amend this article to include the details.
This isn't LinkedIn's first battle with third party services
Also works with Firefox and Safari (a href [sellhack.com]).
It's not clear exactly how their extension worked, but it seems like they just trolled the net & made some educated guesses; it doesn't look like they exploited security-by-obscurity flaws on the part of Linkedin:
So it does a formatting lookup based on other examples from the company the person is at? Doesn't sound like it is abusing an api to me, I do that regularly when stalking people...
..strictly for the lulz, ofc.