Earlier today, eBay issued a press release letting users know that a cyberattack "compromised a database containing encrypted passwords and other non-financial data." Users will be asked to change their passwords just in case, though they noted that eBay "has seen no indication of increased fraudulent account activity." This is sadly just one of many attacks recently, and something that won't be going away anytime soon, if ever.
Attacks like this are nothing new, over the years plenty of big-name sites have become victim to similar cyberattacks. Retial chain Target has been all over the news lately, and there's also vulnerabilities like the recent Heartbleed Bug that affected Google, Facebook, Yahoo and dozens of other sites.