Cyber Security Researcher
Abdusselam Karahan — Cyber Security Researcher
I read web applications through an attacker's eyes. I find the flaw, prove it, report it and help close it.
Siber Vatan · Yavuzlar · 2026
From the gym floor to the terminal.I read every system like an opponent,find its weak spot, prove itand help close it.
Frames from the field
A path that runs from physical education teaching to cybersecurity. Every day I go a little deeper.
Abdusselam KarahanFocus areas
Red Team
I simulate the path a real adversary would take, end to end, within scope and rules of engagement.
- Penetration testing
- Network security
- Linux
- Active Directory basics
- Privilege escalation
Web App Security
Through black-box and white-box testing I hunt for logic- and architecture-level flaws in web applications.
- OWASP Top 10
- API security
- Auth & access control
- PHP code review
- Burp Suite
Journey
Experience, education & certifications
Aug 2024 — May 2026Cyber Security Researcher
Yavuzlar · Tam zamanlı · Uzaktan
Worked on web application security projects in the Yavuzlar Web Security and Software Team, founded under the Siber Vatan programme and focused on web security and software development.
- Web Application Security
- PHP
- Software Development
Jun 2025 — Sept 2025IT Personeli
BLADECO YATIRIM A.Ş. · Tam zamanlı · Ofiste
Supported the company's IT infrastructure and end-user operations in Gönen, Isparta.
- IT Support
- Networking
Apr 2023 — Jun 2023Trainee
Yetkin Gençler (YetGen) · Program
Completed a 12-week 21st-century competencies programme covering effective presentation, teamwork, career planning and financial literacy.
- Teamwork
- Presentation
Oct 2025 — PresentAnadolu Üniversitesi
Bachelor's — Management Information Systems
Jan 2021 — May 2025Burdur Mehmet Akif Ersoy Üniversitesi
Bachelor's — Physical Education and Sports Teaching
- 01
API Security Fundamentals '25APIsec UniversityDec 2025 - 02
Siber Vatan BootcampSiber VatanJul 2024 - 03
Sızma TestiBgTek Cyber SecurityFeb 2024 - 04
Beyaz Şapkalı HackerCyropsDec 2023 - 05
Linux UnhatchedCiscoAug 2023 - 06
Introduction to Cyber SecurityCiscoAug 2023 - 07BAAğ TemelleriBTK AkademiJul 2023
- 08BATemel Ağ TeknolojileriBTK AkademiJul 2023
- 09
Turkcell Geleceği YazanlarTurkcellJul 2023 - 10
Yetkin GençlerYetkin GençlerJul 2023
Latest posts
Sharing what
I learn
No posts yet.
Research
Hall of Fame
Findings reported through responsible disclosure, CVE records, acknowledgements and CTF placements.
Status: the hunt is on
My first CVE
is on its way.
There is no CVE or Hall of Fame entry with my name on it yet — but I'm working on it. I report through bug bounty programmes with responsible disclosure; when this space fills up, you'll be the first to see it.