Credential Stuffing Attacks: Defense Strategies

Protect against automated login attacks using breached credentials.

Credential stuffing uses breached passwords to compromise accounts.

Attack Method

1. Obtain breach database
2. Automate login attempts
3. Exploit password reuse
4. Bypass rate limits

- Login spikes from many IPs
- Geographic impossibilities
- Failed login clusters
- Bot-like behavior patterns

- Enforce MFA
- Implement CAPTCHA
- Use breach password checking
- Rate limiting
- Bot detection (Cloudflare, PerimeterX)