Activity Feed
A timeline of my recent cybersecurity activities, including machine solves, CTF challenges, vulnerability research, and continuous learning milestones.
Available for work
Hi, I'm
Karuppiah Sabari Kumar
Wait, what if an AI gave an intro about me instead? 🤔 Give it a listen:
Listen to this intro
0xsabre@kali:~$
cat intro.txt
Welcome
I'm 0xsabre, a Penetration Tester who spends most days breaking web applications, APIs, and testing security boundaries to find vulnerabilities that matter.
I focus on manual testing, logic flaws, and understanding how systems behave — not just running scanners. I've done vulnerability research and responsible disclosure, with a few CVEs along the way.
This site is where I document my research, share testing methodologies, and write about security concepts I'm exploring. If you're learning security, testing applications, or just curious about how things break — you might find something useful here.
0xsabre@kali:~$
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