The Scripts on Your Checkout Page Are Now a PCI DSS Problem
Jun 18, 2026
Payment Security / Compliance
An independent PCI assessor tested Reflectiz against the new PCI DSS rules. Here is the verdict: See the full QSA assessment here → When a customer types their card number into your checkout, their browser is running far more than your code. Analytics tags, a tag manager, a support widget, a payment iframe: a modern checkout loads dozens of third-party scripts, and any one of them can be turned into a skimmer. This is how Magecart works. Sansec has counted more than 100,000 sites hit by web skimming and supply-chain attacks. The 2018 British Airways breach alone exposed 380,000 transactions and a fine that started at £183 million. The dangerous part: the malicious code usually arrives through a script you already approved. Attackers compromise a third-party vendor, and the payload rides in on a script you have run for months. Nothing looks new. What changed is the script's behavior, not its presence on the page. PCI DSS v4.0.1 closes that gap with two requirements, now...