Credential Stuffing

Credential stuffing is a cyberattack method in which attackers use stolen username and password combinations from one data breach to gain unauthorized access to user accounts on various online services. This attack leverages the fact that many people reuse the same credentials (usernames and passwords) across multiple websites and services. When one of these websites is breached and user data is exposed, cybercriminals take these stolen credentials and attempt to access other accounts using the same username and password combinations.