Security Guide: Credential Stuffing Attack

 Disclaimer: This brief guide doesn’t cover all scenarios. For urgent credential compromise, click the big red button or call us.

Credential stuffing uses stolen username/password combos on multiple sites, exploiting password reuse. The attacker tries huge lists of leaked credentials at scale.


Immediate Steps:

  • Force Password Resets: Prompt all users or employees to change passwords, especially if reused.

  • Implement MFA: Make multi-factor authentication mandatory on critical systems.

  • Monitor Login Logs: Watch for large volumes of failed logins or unknown IP addresses.

  • Block Bad IPs: Use geo-restriction or WAF rules to slow automated login attempts.

  • Educate Users: Urge them to avoid reusing passwords across platforms.

  • Consider Breach Notification: If user accounts were compromised, they may need to be alerted.

 Credential stuffing thrives on weak or reused passwords. A forced reset and robust MFA setup reduce the attack’s success and safeguard user accounts.

Fending off a credential stuffing attack? Click the big red button for help or call us now to speak with a specialist

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