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home / skills / jeremylongshore / claude-code-plugins-plus-skills / xss-vulnerability-scanner

xss-vulnerability-scanner skill

/skills/03-security-fundamentals/xss-vulnerability-scanner

This skill helps you implement and validate xss vulnerability scanning by guiding configurations, best practices, and production-ready code.

npx playbooks add skill jeremylongshore/claude-code-plugins-plus-skills --skill xss-vulnerability-scanner

Review the files below or copy the command above to add this skill to your agents.

Files (1)
SKILL.md
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---
name: "xss-vulnerability-scanner"
description: |
  Scan xss vulnerability scanner operations. Auto-activating skill for Security Fundamentals.
  Triggers on: xss vulnerability scanner, xss vulnerability scanner
  Part of the Security Fundamentals skill category. Use when working with xss vulnerability scanner functionality. Trigger with phrases like "xss vulnerability scanner", "xss scanner", "xss".
allowed-tools: "Read, Write, Grep, Bash(npm:*)"
version: 1.0.0
license: MIT
author: "Jeremy Longshore <[email protected]>"
---

# Xss Vulnerability Scanner

## Overview

This skill provides automated assistance for xss vulnerability scanner tasks within the Security Fundamentals domain.

## When to Use

This skill activates automatically when you:
- Mention "xss vulnerability scanner" in your request
- Ask about xss vulnerability scanner patterns or best practices
- Need help with essential security skills covering authentication, input validation, secure coding practices, and basic vulnerability detection.

## Instructions

1. Provides step-by-step guidance for xss vulnerability scanner
2. Follows industry best practices and patterns
3. Generates production-ready code and configurations
4. Validates outputs against common standards

## Examples

**Example: Basic Usage**
Request: "Help me with xss vulnerability scanner"
Result: Provides step-by-step guidance and generates appropriate configurations


## Prerequisites

- Relevant development environment configured
- Access to necessary tools and services
- Basic understanding of security fundamentals concepts


## Output

- Generated configurations and code
- Best practice recommendations
- Validation results


## Error Handling

| Error | Cause | Solution |
|-------|-------|----------|
| Configuration invalid | Missing required fields | Check documentation for required parameters |
| Tool not found | Dependency not installed | Install required tools per prerequisites |
| Permission denied | Insufficient access | Verify credentials and permissions |


## Resources

- Official documentation for related tools
- Best practices guides
- Community examples and tutorials

## Related Skills

Part of the **Security Fundamentals** skill category.
Tags: security, authentication, validation, owasp, secure-coding

Overview

This skill provides automated assistance for XSS vulnerability scanner operations within the Security Fundamentals domain. It helps identify, reproduce, and remediate cross-site scripting issues by generating test payloads, scanning workflows, and secure-coding guidance. The skill is auto-activating when XSS scanner-related phrases are used and is designed for practical, production-ready outputs.

How this skill works

The skill inspects input handling points, HTML/JavaScript output contexts, and common injection sinks to suggest targeted XSS payloads and scanning strategies. It generates step-by-step scanning workflows, code snippets for safe input encoding/validation, and configuration templates for automation. It also validates findings against common patterns and offers prioritized remediation guidance based on risk and exploitability.

When to use it

  • You need to detect reflected, stored, or DOM-based XSS in web apps
  • You want reproducible test cases and payloads for a bug report
  • You need secure-coding examples for input validation and output encoding
  • You are automating security checks in CI/CD or pre-deploy pipelines
  • You want remediation steps mapped to risk level and exploitability

Best practices

  • Treat all untrusted input as hostile and apply context-aware output encoding
  • Use a combination of automated scans and manual testing for DOM and logic-based XSS
  • Implement input validation, output encoding, and Content Security Policy (CSP) together
  • Sanitize data on both client and server; prefer allow-lists over deny-lists
  • Automate scans in CI with fail-on-high-severity policies and human review for high-risk findings

Example use cases

  • Generate payloads and PoC steps for a reported reflected XSS on a search form
  • Create a CI job that runs XSS scanning against staging and blocks merges on critical findings
  • Produce secure-coding examples for developers to fix stored XSS in user profile fields
  • Map scan results to remediation tickets with suggested code patches and validation tests
  • Validate a web app’s CSP and suggest policy tweaks to mitigate inline-script XSS vectors

FAQ

Does the skill replace manual testing?

No. It augments manual testing by automating repeatable checks and generating payloads, but manual inspection is needed for complex DOM and logic issues.

What prerequisites are required?

A development or staging environment, access to the target application, and installed scanning tools or CI integration are required. Basic knowledge of web security concepts is assumed.