What Does Credential Stuffing Mean?
Credential stuffing is a term related to a specific type of hacking that secures user credentials by breaching a system, and then attempts to use those credentials with other systems. Like other kinds of related hacking, credential stuffing attacks rely on hackers being able to get into a network and take out sensitive user information such as passwords and usernames.
Techopedia Explains Credential Stuffing
What happens with credential stuffing is that hackers take that stolen information related to one site or system, and use it in a brute force hacking attempt to try to get into various other systems. Sometimes hackers evaluate whether one password or username can be used for another website, whether it is related to the original website or not.