E-commerce security: the 7 vulnerabilities that cost the most sales
Abandoned cart, checkout without HTTPS, outdated plugin, and exposed backup: what drops an online store's conversion and how to close each gap.
1. Checkout outside of HTTPS
If any step of the purchase — including the address page or shipping calculation — opens in HTTP, the browser flags the page as not secure and the customer abandons it. More seriously: traffic travels in plain text. Force HTTPS across the entire site, not just the cart.
2. Admin panel open to the internet
O /admin da loja respondendo ao mundo inteiro é convite para força bruta. Restrinja por IP, ative segundo fator e limite tentativas de login. One painel invadido significa preço alterado, pedido falso e dados de clientes vazados.
3. Outdated plugin or theme
Most store breaches do not use unknown flaws: they use old plugins with previously published vulnerabilities. Update routinely — and test on a copy before pushing to production.
4. Backup inside the public directory
Backup.zip or dump.sql accessible via URL hands over the entire customer database. Store it outside the public directory and test the restoration once in a while: an untested backup is not a backup.
5. Form and API without rate limiting
Without request limits, the contact form becomes a spam tool and the API serves as a basis for price scraping. Rate limiting and a simple captcha solve most of it.
6. Card data passing through the server
If the store stores card numbers, it falls under a much stricter security regime. Use gateway tokenization (the card never touches your server) and reduce the scope of any audit.
7. No monitoring after delivery
Stores change every day: new products, new plugins, promotions. Each change can reopen a closed loophole. Without continuous verification, the owner finds out about the problem on customer review sites, not on the dashboard.
None of these seven flaws require a sophisticated hacker — all of them appear in a surface assessment. What separates the store that makes sales from the one that leaks data is the routine of checking and fixing before the customer notices.