PCI DSS 4.0.1 requires merchants to maintain a justified inventory of every script on their payment pages (requirement 6.4.3) and to monitor continuously for unauthorised changes (requirement 11.6.1). Manual spreadsheet inventories no longer satisfy auditors. Client-side security platforms like cside automate both: they catalogue every script by vendor and hash, alert on changes in real time, and generate the audit-ready reports QSAs need. VikingCloud has formally validated that cside's approach meets both requirements.
How do client-side attacks actually happen?
Compromising a third-party service your website relies on is one common way attackers get in.
Why can't traditional security tools detect client-side threats?
Firewalls, WAFs, and vulnerability scanners are traditional security tools used to protect your server, but they cannot see what's happening in your users' browsers.
What's the difference between client-side security and server-side security?
Server-side security protects your infrastructure, while client-side security focuses on where your application actually runs, inside your users' browsers.
What's the difference between client-side security and application security?
Client-side security is a critical subset of AppSec that focuses on protecting applications where they actually execute--in users' browsers.