@x_6glitch6_x: Top-Paying XSS Vulnerabilities — Let’s Break Down How They Were Discovered and the Techniques Used What’s XSS Anyway? Simply put, it's when you inject malicious code into a website or application, and that code runs in the victim's browser — allowing you to steal their data or perform actions on their behalf. Pretty dangerous, right? Ready? Let’s dive into the game-changing XSS exploits: 1. XSS via File Upload + CSRF (The Skilled Hunter!) 🎣 Target: Find a file upload feature — like a live chat support widget or form. Plan of Attack: Fire up Burp Suite and monitor the requests when uploading a file. You’ll likely find something like POST /upload_file. Look for a key sign of vulnerability: No CSRF tokens in the request. That means you can send requests without the site verifying if you’re the legitimate user. Craft your malicious payload: "> Technical Breakdown: We use onerror to execute the code when the image fails to load. String.fromCharCode converts your server URL into ASCII to bypass filters. XMLHttpRequest grabs the victim’s cookies and sends them to your server. Name the file with the payload and upload it. As soon as the support agent opens the chat and sees the filename — the code runs automatically. Result: You gain full access to the support agent’s account! Key Takeaways: Any file upload feature can be a goldmine for XSS. onerror executes code without any user interaction. ASCII encoding can bypass many filters. #BountyHunter #blackhat11 #linux #CyberSecurity

"MR»"G¥B^H™«

Open In TikTok:

Region: EG

Tuesday 10 June 2025 13:16:38 GMT