The folks over at Microsoft (who now owns Skype) fixed a bug earlier today that potentially would have allowed anyone to hijack a Skype account simply by knowing the e-mail address the account was associated with. Apparently the vulnerability was found at least 3 months ago by a Russian researcher who claims that many users were affected. I'm not aware of any procedures in place to reclaim a Skype ID that was hijacked, but if anyone knows of one please let us know either by leaving a comment or contacting us via the contact page. Trend Micro has a pretty good writeup, so I won't rehash the whole thing here and Microsoft has responded.
Nov 14th 2012
5 years ago