Perform the following actions
- Change your password on all websites for which you have been affected.
- Check whether you also use the affected access data (user name/email address, password) for other websites.
- If you also use your password on other websites, change it on these websites as well.
Further information can be found in the FAQ of the Hasso-Plattner-Institut Identity Leak Checker .
If your university account, or a user account for a system at the university, is affected, this is an Information Security Incident