In 2012 LinkedIn was hacked. The company then claimed that 6.5 million accounts had been compromised. However, it has since emerged that the leak was even more serious. 117 million user account passwords have appeared for sale on the Dark Web.
LinkedIn has responded to the news with a blog post by describing its current data security arrangements and suggesting account holders change their passwords whether they received a LinkedIn prompt to do so or not.
Source: Bitter Wallet.