5 security mistakes I see most often in online stores
A short review of recurring e-commerce vulnerabilities — from security headers to discount logic.
During e-commerce security audits, certain mistakes come back remarkably often. Here are five of them — if you run a store, it is worth checking each point.
1. Missing security headers
Content-Security-Policy, Strict-Transport-Security, X-Content-Type-Options —
a simple layer of protection that many stores skip. Implementing them takes a
moment and significantly hinders a range of attacks.
2. Business logic flaws
Discount codes that can be stacked indefinitely, prices calculated on the client side, carts prone to manipulation — these are vulnerabilities a scanner will not catch. They have to be tested manually.
3. Sensitive data in logs
Order numbers are one thing, but personal data or session tokens in logs are a real problem. It is worth verifying exactly what ends up in your logging system.
4. Outdated components
Plugins and libraries without updates are one of the most common entry points for an attacker. A regular dependency review should be routine.
5. Weak session configuration
Cookies without Secure and HttpOnly flags, overly long session lifetimes, no
identifier rotation after login — small details that together create serious
risk.
Want to be sure your store is secure? Order an audit.