How We Won $250 from a HackerOne XSS Challenge | Walkthrough & Exploit (2020)

In this video, we walk you through one of the classic XSS challenges hosted by HackerOne years ago — a challenge that awarded us $250 upon successful exploitation. Our team of researchers dives deep into the vulnerability, explaining the thought process, payload crafting, and how we ultimately bypassed the challenge’s filters.

Whether you're new to XSS or an experienced bug bounty hunter, this breakdown offers valuable insights into practical exploitation techniques.

🔍 Challenge: HackerOne XSS Challenge
💰 Reward: $250
🛠️ Focus: XSS payload crafting, filter bypass, browser behavior

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Discovered and responsibly reported by the NullSecX research team.
This vulnerability is now patched.
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Видео How We Won $250 from a HackerOne XSS Challenge | Walkthrough & Exploit (2020) канала NullSecX