Opera Sync Users May Have Been Compromised In Server Breach (fortune.com)

An anonymous reader writes: Someone broke into Opera's servers. The Opera browser has a handy feature for synchronizing browsing data across different devices. Unfortunately, some of the passwords and login information used to enable the feature may have been stolen from Opera's servers. Opera's sync service is used by around 1.7 million people each month. Overall, the browser has 350 million users. The Norwegian firm told its users that someone had gained access to the Opera sync system, and "some of our sync users' passwords and account information, such as login names, may have been compromised." As a result, Opera had to reset all the passwords for the feature, meaning users will need to select new ones.

Comments

How was it compromised

[hyperar]

Did they break in by a security hole or did they used compromised credentials to break in? Any info on that matter?