Cross Site Scripting And Html Injection Testing

What it does

This skill enables AI agents to systematically identify Cross-Site Scripting (XSS) and HTML Injection vulnerabilities within web applications. It automates the process of injecting malicious payloads to detect unsafe input handling and broken output encoding across various contexts.

When to use it

• Auditing user-generated content fields like comment sections or forums for potential script execution risks.
• Testing dynamic search bars and URL parameters that reflect user input back into the browser.
• Validating security controls in web forms before deploying a new application version.
• Performing automated penetration testing on third-party integrations to ensure safe data exchange.

Key capabilities

• Detects reflected, stored, and DOM-based XSS vulnerabilities.
• Identifies HTML injection flaws where raw tags are rendered without sanitization.
• Automates payload generation and execution across different input vectors.
• Reports specific locations and severity levels of discovered injection points.

Example prompts

• "Scan the login page at https://example.com/login for reflected XSS vulnerabilities using this skill."
• "Test the search functionality on https://shop.example.com/products?q= to identify HTML injection risks."
• "Run a comprehensive XSS and HTML injection audit on the user profile settings section of this application."

Tips & gotchas

Ensure you have explicit authorization before testing any live environment, as injecting payloads can trigger false positives or unintended side effects. This skill focuses on detection; remediation requires manual code review to implement proper output encoding or Content Security Policies.