A PrestaShop store, how not to hand customer data to an attacker
An online shop differs from an ordinary site in one crucial way: money and customer data pass through it. That makes it a far more attractive target. An attacker who takes over an ordinary brochure site adds spam. One who takes over a shop can quietly intercept card data, and do so for weeks before anyone notices.
PrestaShop is a solid shop engine, popular in Poland. Like any, it needs conscious care. Here is what to watch for.
The most dangerous scenario: a silent skimmer
The most insidious attack on shops is a so-called skimmer, a tiny piece of malicious code injected into the payment page. It does not break the shop, shows no message. It simply copies the card data the customer enters at checkout and sends it to the attacker. The shop works normally, orders come in, and in the background the most sensitive thing you have leaks.
That is why, with a shop, the question "does the site work" is not enough. You have to watch whether anyone has swapped the code, especially on the cart and payment pages.
The basics that close most doors
- Update PrestaShop and modules. Older versions have publicly known flaws. Watch third-party modules especially, they are the most common way in.
- Remove unused modules and themes. Every unnecessary add-on is an attack surface. Free modules from uncertain sources especially can contain hidden code (we write about this separately in the article on pirated add-ons).
- Change the default admin panel address. PrestaShop lets you give the admin folder a random name, use it. Bots attacking
/adminwill bounce off a wall. - Strong, unique passwords and separate accounts for everyone with back-office access. Enable failed-login limits.
Leave payments to the professionals
The safest shop is one that does not process card data itself. Use reputable payment gateways (PayU, Przelewy24, Stripe, BLIK), where card data is entered on the operator's side, not on your server. Then even a break-in to the shop gives no access to card numbers.
Also make sure the whole shop runs over HTTPS, not just the payment page, but every page. Today that is the absolute minimum and a condition of customer trust.
A backup = your plan B
A shop changes every day: new orders, customers, stock levels. That is why a shop backup is more important than an ordinary site's and should be frequent and stored off-server. In the event of an attack or failure, it is the only thing that lets you return to working order without data loss.
A shop is not "set and forget"
A shop earns as long as it works and inspires trust. A single "this site may be dangerous" warning or a card-data leak can erase trust built over years. That is why shops especially benefit from ongoing monitoring: checking code integrity, updates and a fast response when something deviates from the norm.
Run a PrestaShop store and want to be sure it is secure? Get in touch, we will review it and point out what to improve.