client-side

Identify and analyze client-side vulnerabilities in modern web apps and SPAs.

3|1|Updated May 26, 2026
One-click install
npx skills add https://github.com/LeoWSY-hashblue/-communitytools-custom --skill client-side-leowsy-hashblue
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: client-side
Source: https://github.com/LeoWSY-hashblue/-communitytools-custom/tree/main/skills/client-side
Command: npx skills add https://github.com/LeoWSY-hashblue/-communitytools-custom --skill client-side-leowsy-hashblue

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Client-side vulnerability testing across modern web apps and SPAs to discover XSS, CSRF, CORS misconfigurations, Clickjacking, DOM-based attacks, and Prototype Pollution.

Core Features & Use Cases

  • Detects XSS and DOM-based vulnerabilities across client-side code paths in modern frameworks.
  • Evaluates CSRF protections, CORS misconfigurations, frame-busting vulnerabilities, and DOM clobbering scenarios in SPAs.
  • Use Case: A security team assesses a new React SPA to enumerate potential client-side weaknesses and produce a prioritized remediation plan.

Quick Start

Run a guided client-side vulnerability assessment on a target SPA to detect XSS, CSRF, CORS, and DOM risks.

Frequently Asked Questions about client-side

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I find client-side vulnerabilities like XSS and CSRF in a modern web app?

You can identify client-side vulnerabilities like XSS and CSRF by running a structured assessment that analyzes code paths for DOM-based attacks, CORS misconfigurations, and Prototype Pollution. This provides reproducible workflows and testing guidance for safe evaluations.

What is prototype pollution and how do I test for it in single page applications?

Prototype pollution is a client-side vulnerability where attackers modify JavaScript object prototypes. You test for it in SPAs by evaluating DOM-based attack scenarios and following structured testing guidance to safely reproduce the vulnerability across modern framework code paths.

How do I check for CORS misconfigurations and Clickjacking during a security assessment?

You check for CORS misconfigurations and Clickjacking by evaluating frame-busting vulnerabilities and cross-origin policies. The assessment provides structured testing guidance to detect these client-side risks and supports producing a prioritized remediation plan.

Can I use this to assess a React SPA for DOM-based attacks?

Yes, you can assess React SPAs for DOM-based attacks. The process enumerates potential client-side weaknesses across modern frameworks, detecting XSS, DOM clobbering, and related vulnerabilities to produce a structured remediation plan.

What is the best way to test for DOM clobbering and frame-busting vulnerabilities?

The best way to test for DOM clobbering and frame-busting vulnerabilities is to follow a guided client-side assessment. It evaluates SPA-specific scenarios and provides reproducible workflows for safe, deterministic testing of these DOM risks.

Why do I need a structured workflow for client-side security testing?

You need a structured workflow for client-side security testing to ensure deterministic assessments. It provides reference material and reproducible workflows that systematically detect XSS, CSRF, and DOM risks, preventing missed vulnerabilities during manual reviews.