Adrian Junge (vurlo)

Welcome to my bug collection 🐛

CTF player, vulnerability researcher, and computer science student creating writeups, collecting CVEs, bounties, and notes from real targets and challenges, occasionally algorithmic and LeetCode challenges. I poke things politely and occasionally convince software to confess.

Timeline About me

22 Posts 178 min read 10 CVEs 1 Bounties & more...

Latest notes

Climbing Stairs from Two Angles

Algorithms LeetCode Dynamic Programming Combinatorics

LeetCode's Climbing Stairs problem looks like a simple dynamic-programming challenge, but a closer look connects Fibonacci numbers, binomial coefficients, and Pascal's triangle.

2026-07-05 12 min read

Teaching AI to hack Joomla so I can skip my homework

Security Research PHP SQLI Joomla AI-Assisted Auditing

How a manual SQLi hunt turned into an AI-assisted Joomla audit and multiple assigned CVEs.

2026-06-13 15 min read

Scanwich Station

Authored challenge Hard Pwn Web Challenge by vurlo

A table-side QR reader for hungry guests and suspicious menus. One special order can make the scanner serve more than dinner.

2026-06-05 14 min read 5 solves / 405 points