Securing Payment Pages: PCI DSS 11.6.1 Guide
PCI DSS 11.6.1 (4.0) requires merchants and TPSPs to deploy change- and tamper-detection mechanisms that monitor and alert on unauthorized modifications to payment page scripts and HTTP headers, as seen in the customer’s browser. Monitoring must occur weekly or per a risk-based schedule. Tools like CSP, script behavior monitors, and alerting systems help ensure compliance and prevent e-skimming threats like Magecart.