Iframe Payment Security Risks and PCI DSS 6.4.3 Best Practices
Many teams assume that embedding payment forms in an iframe keeps them compliant with PCI DSS 4.0.1, Requirement 6.4.3. The reasoning sounds logical – compliance seems guaranteed if card data never reaches your infrastructure. However, iframe payment security PCI DSS 6.4.3 doesn’t work on assumptions; it works on control. The responsibility shifts to new layers of your website’s supply chain.