pci dss payment audit

The problem

Merchant websites are frequently compromised via e-skimming and formjacking that injects malicious code into the browser, even if the server-side code remains clean. Developers often falsely believe that using an iframe or redirect for payments exempts them from the mandatory PCI DSS v4.0.1 requirements that addressed these vulnerabilities starting March 2025.

What it does

• Audits payment pages against PCI DSS v4.0.1 Requirement 6.4.3 for script authorization, integrity, and inventory justification.
• Evaluates change-and-tamper-detection mechanisms against Requirement 11.6.1, including security-impacting HTTP headers and script content.
• Identifies "blind spots" in script monitoring, such as fourth-party scripts loaded by tag managers that never appear in your repository.
• Verifies monitoring cadences and alert triggers to ensure compliance with the seven-day minimum or documented Risk Analysis.
• Maps integration models like Stripe/Adyen iframes to the specific parent-page security obligations required for SAQ A eligibility.

Why this beats prompting it yourself

General LLMs often use outdated PCI DSS v3.2.1 knowledge or fail to grasp that compliance is measured at the browser level, not the server. This skill enforces the distinction between site-as-stored and site-as-delivered, preventing the most common "false pass" in script auditing. It bridges the gap between technical script management and the specific attestation language required for 2025 compliance cycles.

Use cases

• Pre-audit a checkout page before a QSA assessment to find unrecorded third-party tags.
• Review a script-monitoring tool setup to see if it covers both headers and DOM content.
• Validate whether a marketing team's new tag manager scripts break compliance.
• Prepare justification documentation for every script running on a payment surface.

Known limitations

This tool is not a QSA and cannot provide formal PCI certification or sign an AOC. It cannot assess live script behavior without access to the delivered DOM or provided script lists.