Cross-Site Scripting (XSS) vulnerabilities remain one of the most prevalent security threats in modern web applications. Security researchers, penetration testers, and bug bounty hunters face constant challenges:

• Scattered Knowledge - XSS payloads are buried across blogs, forums, and personal notes
• Context Confusion - Not knowing which payload works in specific injection contexts
• Defense Evolution - Modern WAFs and filters require increasingly sophisticated bypass techniques
• Learning Curve - Beginners struggle to understand why certain payloads work while others fail
• Time Pressure - Security testing demands quick access to relevant, working payloads

XSSNow transforms the chaotic landscape of XSS exploitation into a structured, intelligent arsenal. We've built more than just a payload database - we've created an ecosystem that understands context, evolves with defenses, and accelerates discovery.

• Context-Aware Categorization - Payloads organized by injection context, not just syntax
• Defense-Focused Grouping - Specific collections for WAF bypasses, encoding evasions, and filter circumvention
• Difficulty Progression - From beginner-friendly basics to expert-level polyglots
• Real-World Testing - Every payload validated against actual applications and defense mechanisms

• Smart Context Detection - Understands where your injection point sits in the application flow
• Restriction-Aware Suggestions - Adapts to character limitations, encoding constraints, and input filters
• WAF-Specific Optimization - Tailored bypass techniques for major firewall vendors
• Custom Length Optimization - Generates payloads within strict character limits

• CSP Bypass Techniques - Navigate Content Security Policy restrictions with confidence
• Encoding Evasion - Break through HTML entity encoding, URL encoding, and custom sanitizers
• Filter Circumvention - Proven methods to bypass keyword blacklists and regex filters
• Browser Quirks - Leverage parser differences across modern browser engines

Visit xssnow.in and start exploring immediately. No installation required.

• HTML Injection - Direct markup insertion and tag manipulation
• Attribute Breaking - Escaping from HTML attributes and event handlers
• JavaScript Context - String breaking and code execution within JS
• CSS Injection - Style-based attacks and expression exploitation
• URL Parameters - Query string and fragment-based vectors

• WAF Bypasses - Techniques for major firewall vendors
• Encoding Evasions - Character set manipulation and obfuscation
• Filter Circumvention - Keyword blacklist and regex bypass
• CSP Violations - Content Security Policy escape techniques
• Polyglot Attacks - Multi-context universal payloads

XSSNow thrives on community collaboration. Whether you're discovering new bypass techniques, improving existing payloads, or sharing knowledge - your contributions drive the platform forward.

• Submit Payloads - Share your latest discoveries and bypass techniques
• Improve Documentation - Help others understand complex attack vectors
• Test Effectiveness - Validate payloads against real-world applications
• Share Knowledge - Write tutorials and educational content
• Report Issues - Help us maintain platform quality

→ Read our Contributing Guidelines

Do NOT use these payloads on systems you do not own or have explicit permission to test.

The CSP Bypass tool includes payload vectors from these amazing projects:

• CSPBypass by @renniepak - Comprehensive CSP bypass payload collection
• JSONBee by @zigoo0 - JSONP endpoints for CSP bypass

Licensed under the MIT License - empowering open security research while maintaining responsible usage standards.