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client-side-security

Safeguard articles tagged "client-side-security" — guides, analysis, and best practices for software supply chain and application security.

6 articles

Application Security

A methodology for testing SPAs for client-side vulnerabilities

DOM XSS, token storage, and API exposure don't show up in a server-side scan — here's a repeatable methodology for testing React, Vue, and Angular apps.

Jul 9, 20266 min read
AppSec

How Attackers Use JavaScript: Common Client-Side Attack Techniques

Using JavaScript for hacking rarely means writing exotic exploits — it means abusing the same DOM APIs, event handlers, and third-party scripts every legitimate site relies on.

Feb 10, 20266 min read
Regulatory Compliance

PCI DSS 4.0 requirement 6.4.3 for e-commerce third-party ...

PCI DSS 4.0 now mandates strict controls over third-party JavaScript on payment pages. Here's what requirements 6.4.3 and 11.6.1 require and how to comply.

Dec 24, 20258 min read
Vulnerabilities

DOM-Based XSS: Finding and Fixing Client-Side Injection

DOM XSS never touches your server, so response scanners miss it. Here is how to trace sources to sinks in client code and shut the flaw down.

Aug 14, 20255 min read
AppSec

Understanding DOM XSS Payloads: How They Work and How to Stop Them

DOM XSS payloads execute entirely in the browser when untrusted input reaches a dangerous sink like innerHTML or eval. Here is how the class works and how to shut it down without shipping exploit code.

May 27, 20256 min read
AppSec

DOM-Based XSS Attacks: How They Work and How to Prevent Them

A DOM based XSS attack executes entirely in the browser, which is why your server-side filters and access logs never see it. Here is how the source-to-sink flow works and what actually stops it.

Feb 11, 20257 min read

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client-side-security — Safeguard Blog