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Cross-Site Scripting (XSS) allows attackers to inject malicious scripts into web pages viewed by other users.

Cross-Site Scripting (XSS) Simulator

Inject malicious scripts to steal sessions and hijack accounts

Attack Progress0%

Victim Browser

https://vulnerable-site.com/search?q=search...
Waiting for XSS injection...
Injected Payload
<script>alert(document.cookie)</script>

Attack Console

Ready
Inject Payload
Execute Script
Steal Cookies
Session Hijacked
Waiting to start...

XSS Attack Types

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Reflected XSS: Payload injected in URL/input, immediately reflected in response. One victim per attack.
•
Stored XSS: Payload stored in database (comment, profile). Triggers for every user who views it. Most dangerous.
•
DOM-based XSS: Vulnerability in client-side JavaScript. Payload never sent to server. Hard to detect.

OPSEC: Training Environment Only

XSS attacks are illegal without authorization. This simulation is for educational purposes. Always use input validation, output encoding, and CSP headers. OWASP Top 10 #3 vulnerability.

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