What Is Credential Stuffing?
Credential stuffing is an automated attack where criminals use stolen username/password combinations from data breaches to access accounts on other sites.
Since many people reuse passwords, credentials stolen from one breach work on multiple sites.
How It Works
- Attackers obtain breach data - Millions of email/password pairs
- Automated tools test combinations - Bots try credentials at scale
- Successful logins are harvested - Working accounts are flagged
- Accounts are exploited - Fraud, theft, or resale
Why Shopify Stores Are Targeted
Stored Payment Methods
Customer accounts often have saved credit cards.
Loyalty Points
Rewards and store credit can be stolen.
Personal Data
Names, addresses, purchase history have value.
Order History
Used for social engineering or identity theft.
Warning Signs
- Spike in failed logins from many IPs
- Password reset requests customers didn’t make
- Account complaints about unauthorized access
- Unusual account activity patterns
- Orders from compromised accounts
Protection Measures
Block Suspicious Traffic
- VPN blocking reduces anonymous attacks
- Geographic blocking limits attack surface
- IP blocking stops known bad actors
Rate Limiting
Shopify provides some protection, but additional blocking helps.
Monitor for Patterns
Watch for unusual login activity in your analytics.
SecurEcommerce’s Role
While Shopify handles authentication, SecurEcommerce helps by:
- Blocking VPN/proxy traffic commonly used in attacks
- Geographic restrictions on login attempts
- IP blocking for identified attackers