https://support.ubi.com/en-US/FAQ.a...=2030&productid=3888&faqid=kA030000000eYZ2CAM
Hello All,
We recently found that one of our Web sites was exploited to gain unauthorized access to some of our online systems. We instantly took steps to close off this access, to begin a thorough investigation with relevant authorities, internal and external security experts, and to start restoring the integrity of any compromised systems.
During this process, we learned that data were illegally accessed from our account database, including user names, email addresses and encrypted passwords. No personal payment information is stored with Ubisoft, meaning your debit/credit card information was safe from this intrusion.
As a result, we are recommending you to change your password by clicking this link.
Out of an abundance of caution, we also recommend that you change your password on any other Web site or service where you use the same or a similar password.
An official forum thread has been created for you to post your questions.
We sincerely apologize for any inconvenience and thank you for your understanding.
What is an encrypted password?
Passwords are not stored in clear-text but as an obfuscated value. Those cannot be reversed but could be cracked, in particular if the password chosen is weak. This is the reason we are recommending our users to change their password.