Client-Side Security

Client-Side Security

Backed by Cloudflare's world-class threat intelligence and machine learning capabilities, Client-Side Security helps defend against browser supply chain attacks that target vulnerable JavaScript dependencies. Simplify PCI DSS compliance, block Magecart-style attacks, and boost visibility into web resources.

Intelligent attack prevention

Machine learning-based protection and threat intelligence drawn from protecting ~20% of all Internet properties.

Improved visibility

Track your third-party scripts, cookies, and active connections from in a single pane of glass.

Automatic threat alerts

Instant notifications when new scripts are detected, marked as malicious, or loaded from unknown domains.

Background Pattern

Use cases

Ways to apply Client-Side Security

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Meet compliance requirements

Reduce third-party vendor risk and address client-side requirements for standards and regulations like PCI DSS, the GDPR, and more.

Prevent financial and identity theft

Block browser-based attacks aimed at your users’ personal and financial information.

Go beyond content security policies (CSP)

Monitor JavaScript dependencies and block threats with threat intelligence and machine learning that goes above and beyond CSPs.

Frequently asked questions

Cloudflare Client-Side Security is a client-side security solution that helps protect users' personal and financial data. It defends websites against attacks targeting vulnerable JavaScript dependencies, from Magecart-style attacks that exfiltrate user data to cryptojacking attacks. Client-Side Security helps web apps maintain compliance with frameworks like PCI DSS and the GDPR.

Client-Side Security continuously monitors a website's third-party scripts and other loaded dependencies for any signs of malicious activity or compromise, such as unauthorized additions, connections, or changes. By using machine learning and Cloudflare's industry-leading threat intelligence, it can instantly identify, report, and block threats before they can affect the website or its visitors.
Client-Side Security prevents browser supply chain attacks, provides automatic alerts for any suspicious script activity, stops financial data theft, and offers assistance in meeting compliance requirements like the GDPR and PCI DSS.
Client-Side Security helps organizations address client-side security requirements. Specifically, it assists with meeting GDPR and PCI DSS standards for detecting compromised third-party scripts and providing alerts.
Client-Side Security is designed to block browser-based attacks that are aimed at stealing the personal and financial information of your users.
Client-Side Security offers protection that goes beyond a standard CSP. While a CSP provides a static set of rules for what resources can be loaded, Page Shield actively monitors JavaScript dependencies and uses advanced threat intelligence and machine learning to detect and block threats.

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