Bug Bounty Hunting & Web App Security Research by Himanshu KumarBug Bounty Hunting & Web App Security Research by Himanshu Kumar

Bug Bounty Hunting & Web App Security Research

Himanshu Kumar

Himanshu Kumar

Background

Over nearly 2 years (2020-2022), I actively participated in bug bounty programs on HackerOne and competed in Capture The Flag (CTF) challenges on Hack The Box. This hands-on security research shaped the foundation of my approach to building secure systems today.

HackerOne Bug Bounty Hunting (Apr 2021 - Jul 2022)

Participated in multiple bug bounty programs, identifying and responsibly disclosing security vulnerabilities in production web applications. Focus areas included:
SQL injection discovery and exploitation
Cross-site scripting (XSS) — reflected, stored, and DOM-based
Authentication bypass and session management flaws
OWASP Top 10 vulnerability assessment across live targets
Writing clear, reproducible proof-of-concept reports for engineering teams

Hack The Box CTF Challenges (Sep 2020 - Jul 2022)

Spent nearly 2 years on Hack The Box, working through machines and challenges that covered:
Web application penetration testing
Vulnerability assessment and exploitation
Privilege escalation techniques
Network enumeration and service fingerprinting
Real-world attack simulation in controlled environments

How This Informs My Engineering Work

Every authentication system, API endpoint, and multi-tenant architecture I build today is informed by knowing how attackers think. My security research background means I don't just follow OWASP checklists — I understand the actual attack vectors behind each item and build defenses accordingly.
This experience directly feeds into my current work: OAuth/JWT implementations, session hardening, role-based access control, and security audit logging.
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Posted Jun 16, 2026

2 years of HackerOne bug bounty hunting and Hack The Box CTFs. Found and reported SQL injection, XSS, and auth bypass vulnerabilities in production apps. This is why I build secure systems.