Servers belonging to the web browser developer Opera have been compromised, and user data may have been accessed as a result. The hack affects Opera Sync accounts, which are used to share data such as bookmarks across multiple devices.
Announcing the compromise, Opera said that although the attack was blocked soon after it started, user information may still have been stolen.
“This attack was quickly blocked,” the company stated in a blog post. “Our investigations are ongoing, but we believe some data, including some of our sync users’ passwords and account information, such as login names, may have been compromised.”
As a result of the attack, the company has decided to reset the passwords of all Opera sync users.