Tools / Pentest / Use Cases / Test for Cross-Site Scripting (XSS) / Claude

How to Test XSS Exposure with Claude

Test for cross-site scripting with Claude and ToolRouter. Detect XSS vulnerabilities.

Claude transforms penetration testing into a conversational security review where each discovered vulnerability leads to deeper investigation. Ask Claude to scan your application, explain each finding in context, chain additional targeted tests based on initial results, and generate remediation code for every issue found. Its analytical depth is ideal for security-conscious developers who want to understand not just what is vulnerable but why and how to fix it permanently.

Connect ToolRouter to Claude

1Go to Settings → Connectors → Add custom connector

2Enter the details below and click Add

Name

ToolRouter

URL

https://api.toolrouter.com/mcp

3Done — works on Claude chat, desktop, and mobile

Steps

Once connected (see setup above), use the Pentest tool:

Ask Claude: "Test this application for XSS vulnerabilities using pentest" and provide the URL
Claude sends XSS payloads to input fields and analyzes responses
Review which inputs reflect or store unsanitized user content
Implement proper output encoding and Content Security Policy headers

Example Prompt

Try this with Claude using the Pentest tool

Test https://staging.myapp.com for XSS vulnerabilities. Check all user input fields including comments, search, profile fields, and URL parameters.

Tips

Ask Claude to test for both reflected and stored XSS variants
Request Content Security Policy header recommendations based on the findings
Test with different encoding contexts: HTML, JavaScript, URL, and CSS

More Claude Guides

How to Scan Web App Vulnerabilities with Claude How to Test API Security with Claude How to Check SQL Injection with Claude How to Scan Auth Weaknesses with Claude How to Test CORS Security with Claude

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