Adrian Junge (vurlo)

Welcome to my bug collection 🐛

CTF player and computer science student creating writeups, collecting bounties and CVEs. Sometimes I lose myself in algorithmic challenges.

Teaching machines to misbehave.

Timeline About me

22 Posts 179 min read 27 CVEs

7 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.

5 Jul 2026 12 min read

Teaching AI to hack Joomla so I can skip my homework /s

Security Research PHP SQLI Joomla CMS AI-Assisted Auditing

How a manual SQLi hunt turned into an AI-assisted Joomla audit, two assigned CVEs, and a surprisingly valid way to pass a university lab.

13 Jun 2026 16 min read

Scanwich Station

Challenge by vurlo Authored challenge Hard Pwn Web

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

5 Jun 2026 14 min read 5 solves / 405 points