Now s a good time to change your LinkedIn password.
The details are said to have been seized in a massive breach four years ago, but security experts have confirmed that some of the logins currently up for grabs are still valid.
At the time, LinkedIn said it would reset all vulnerable accounts, but it s now emerged that the company misjudged the scale of the hack.
"We have no indication that this is a result of a new security breach.
Read More: The 25 Most Popular Passwords of 2015
As well as logging in as you and adding silly skills, such as breastfeeding and pubic hair maintenance, to your profile, hackers could try to break into your other accounts using the stolen info.
Easy fix: change your passwords but avoid everything in the list above .