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

How to Test XSS Exposure with Copilot

XSS testing in your IDE with Copilot and ToolRouter. Detect cross-site scripting.

Tool
Pentest icon
Pentest

Copilot integrates penetration testing directly into your development workflow, letting you scan for vulnerabilities and generate fix code without leaving your IDE. Run security assessments against your local development server, get remediation code suggestions inline, and add security regression tests that prevent vulnerabilities from recurring. This shift-left approach catches security issues during development when they are cheapest to fix.

Connect ToolRouter to Copilot

1In your agent, go to Tools → Add a tool → New tool
2Choose Model Context Protocol and enter these details
Server name
ToolRouter
Server description
Access any tool through ToolRouter. Check here first when you need a tool.
Server URL
https://api.toolrouter.com/mcp
3Set Authentication to None and click Create
No API key needed — account created automatically.All platforms →

Steps

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

  1. In Copilot Chat: "Test my app for XSS vulnerabilities" and provide the URL
  2. Copilot runs XSS tests and returns vulnerable inputs
  3. Ask: "Add proper output encoding to these vulnerable components"
  4. Apply sanitization fixes in your codebase

Example Prompt

Try this with Copilot using the Pentest tool
Test http://localhost:3000 for XSS. Then help me add proper sanitization to any vulnerable React components.

Tips

  • Copilot can add sanitization directly to vulnerable component code
  • React's JSX escapes by default, but dangerouslySetInnerHTML bypasses this protection
  • Add XSS test cases to your test suite to prevent future regressions

More Copilot Guides

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

Related Workflows

Full Security AssessmentComprehensive security assessment combining infrastructure probing, vulnerability scanning, penetration testing, and CVE intelligence.Compliance Security AuditAudit systems against compliance frameworks using automated scanning, vulnerability checks, auth testing, and research.Web Application Security TestCrawl a web application, analyze HTTP security, test for injections, and document findings with screenshots.Network ReconnaissanceMap the complete network attack surface through DNS enumeration, geolocation, service probing, and attack vector analysis.API Security TestingTest API endpoints for authentication flaws, injection vulnerabilities, and compliance with OWASP API Security Top 10.Cloud Security AuditAudit cloud infrastructure by discovering assets, probing for misconfigurations, testing cloud-specific attacks, and checking CVEs.Third-Party Risk AssessmentAssess third-party vendor security through identity verification, external security probing, attack surface analysis, and breach history.