I’d submitted hundreds of standard XSS payloads with zero results. I was ready to quit, until I learned that the real treasure isn’t in the front-end — it’s in the admin panels and internal dashboards you never get to see. That shift to Blind XSS is what unlocked my first four-figure bounty.

Introduction

Imagine this: you inject a payload, forget about it for weeks, and then get an alert that it was triggered — not by a regular user, but by a high-level administrator from an internal company dashboard you never even knew existed. That’s the power of Blind XSS.

This isn’t a standard XSS flaw that’s immediately apparent. Blind XSS is a type of stored XSS where your payload is saved by the application and then executed in a context that you can’t see directly, such as a support ticket viewed by an agent or an internal analytics panel. You don’t get an instant pop-up; you get a callback, often days or weeks later, with proof that your payload fired in a privileged location.

This vulnerability is classified as a high-severity vulnerability because it often leads to session hijacking, account takeover, and the compromise of sensitive internal systems. The…