Credential Stuffing Attacks: Defense Strategies

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

Detection Signs

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

Prevention

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