xss

Identify and validate cross-site scripting vulnerabilities across stored, reflected, DOM-based, and blind contexts.

2|Updated Apr 21, 2026
One-click install
npx skills add https://github.com/din4e/Skills4RedTeam --skill xss-din4e
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: xss
Source: https://github.com/din4e/Skills4RedTeam/tree/main/skills/offensive-xss
Command: npx skills add https://github.com/din4e/Skills4RedTeam --skill xss-din4e

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Cross-Site Scripting testing and exploitation in web applications require a structured, repeatable approach to discover stored, reflected, DOM-based, and blind XSS issues, including payloads, context awareness, and mitigation guidance for bug bounty and security assessments.

Core Features & Use Cases

  • Discovery of XSS types: stored, reflected, DOM-based, and blind XSS
  • Support for polyglot payloads, CSP bypass techniques, and event-handler injection
  • Context-aware testing workflow with evidence collection for bug bounty reports
  • Use cases: web app security testing, vulnerability research, and hardening guidance

Quick Start

Begin by identifying input points (URL parameters, headers, and form fields) and applying a standard XSS payload suite to detect and verify vulnerabilities.

Frequently Asked Questions about xss

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

FAQPage Schema
How do I test for cross-site scripting vulnerabilities across different web app contexts?▼

To test for cross-site scripting vulnerabilities, identify input points like URL parameters and form fields, then apply a standard payload suite to detect and verify stored, reflected, DOM-based, and blind XSS issues across modern SPAs and traditional web applications.

What is the difference between stored, reflected, and DOM-based XSS testing?▼

Stored, reflected, and DOM-based XSS testing differ by payload delivery: stored XSS persists malicious input server-side, reflected XSS bounces input off server responses, and DOM-based XSS executes entirely client-side within the browser's document object model.

Can I use XSS testing workflows for bug bounty engagements and vulnerability research?▼

Yes, XSS testing workflows support bug bounty engagements and vulnerability research by applying context-aware payload selection, bypass attempts, and structured evidence collection to validate cross-site scripting flaws and generate mitigation guidance.

What's the best way to bypass Content Security Policy when testing for XSS flaws?▼

To bypass Content Security Policy during XSS testing, apply polyglot payloads and event-handler injection techniques designed to circumvent CSP restrictions, testing various contexts until a successful script execution path is discovered.

Does XSS testing work with modern single page applications?▼

XSS testing works with modern single page applications by analyzing client-side DOM manipulation, identifying untrusted data sources, and validating DOM-based vulnerabilities specific to JavaScript frameworks and dynamic content rendering.

Why is XSS testing not finding vulnerabilities in my web application?▼

XSS testing may fail to find vulnerabilities due to insufficient context analysis, missing blind XSS testing endpoints, inadequate polyglot payload coverage, or effective input validation filters blocking standard event-handler injection attempts.