Credential stuffing explained: How to prevent, detect and defend against it

Credential stuffing definition

Credential stuffing is the automated use of collected usernames and passwords to gain fraudulent access to user accounts. Billions of login credentials have landed in the hands of hackers over the past several years as a result of data breaches. These credentials fuel the underground economy and are used for everything from spam to phishing and account takeovers. Credential stuffing attacks are one of the most common ways cybercriminals abuse stolen usernames and passwords.