0l4bs Cross-site scripting labs is a collection of 20 XSS challenges designed for learning and practicing cross-site scripting vulnerabilities. The platform provides various scenarios including URL-based XSS, form-based XSS, User-Agent exploitation, referrer-based attacks, and cookie manipulation vulnerabilities. The challenges cover different XSS contexts and filtering bypass techniques: - Basic injection points (URL, forms, headers) - Storage-based vulnerabilities (LocalStorage, cookies) - Authentication bypass scenarios (login pages) - File upload XSS vectors - Encoding challenges (Base64) - Filter evasion techniques (alert removal, script tag filtering) - Advanced filtering bypasses (preg_replace, regex filters) - HTML entity encoding scenarios - Input value manipulation attacks The lab environment can be deployed using XAMPP/LAMPP web servers or through Docker containers. It provides a controlled environment for security professionals and students to understand XSS attack vectors and develop defensive strategies against cross-site scripting vulnerabilities.