Client-side security protects your website visitors from malicious JavaScript attacks that happen directly in their browsers. Unlike traditional security that focuses on your servers, client-side threats target the scripts running on your actual web pages, like payment forms, chatbots, and analytics tools. These attacks can steal credit card information, passwords, session tokens, and sensitive personal information without a user or admin even knowing. If you handle payments or sensitive data, you need client-side security to protect your customers and meet compliance requirements like PCI DSS.
Client-side attacks typically occur when a malicious actor compromises a third-party service your website uses.
Traditional security tools are designed for server infrastructure and can't see what's executing in users' browsers.
Server-side security protects your infrastructure, while client-side security protects where your applications actually execute in users' browsers.
Client-side security is a critical subset of AppSec that focuses on protecting applications where they actually execute--in users' browsers.