What is a credential stuffing attack?

A credential stuffing attack is primarily characterized by the misuse of stolen login credentials to gain unauthorized access to multiple online accounts. This type of attack capitalizes on the common practice of individuals reusing usernames and passwords across different websites and services. When attackers obtain a collection of these credentials, often through data breaches or leaks, they use automated tools to try those same credentials across various platforms in hopes of successfully breaching accounts where users have not changed their passwords or where the same credentials have been reused.

Understanding this attack method emphasizes the importance of maintaining unique passwords for different accounts and using additional security measures like two-factor authentication. It showcases the need for organizations to implement safeguards against such attacks, such as monitoring for unusual login attempts and encouraging users to adopt stronger credential hygiene practices.