Timeline

Timeline

Security research, CTF writeups, blog posts, CVEs, bug bounties, authored challenges, certificates, talks, and achievements ordered by date.

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22 of 72 items

  • 2026

    6 items
    • Climbing Stairs from Two Angles 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. 12 min read
    • Teaching AI to hack Joomla so I can skip my homework /s 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. 16 min read
    • Scanwich Station A table-side QR reader for hungry guests and suspicious menus. One special order can make the scanner serve more than dinner. 14 min read
    • Funny Java Strings? Java Strings are immutable, interned, optimized, and surprisingly easy to misunderstand when secrets are involved. This post digs into String pooling, reflection, Base64 copies, library APIs, and why heap dumps are bad news for secrets. 9 min read
    • xmalloc All of our slot machines switched from using the very insecure libc heap implementation to something much more secure internally. Surely this new heap implementation is unbreakable :D 9 min read
    • HTB CPTS My experience completing the Hack The Box Certified Penetration Testing Specialist (HTB CPTS) certification. I share the journey, rough timeline, exam tips, and tools that helped me succeed. 8 min read

  • 2025

    13 items
    • My Flask App A small Flask application from an easy SekaiCTF web challenge. 7 min read
    • Fancy Web The Ministry of Information and Communications Technology of Konoha has recently launched their new official website. While it appears to be a standard government portal showcasing public services and announcements, our intelligence sources have indicated that this WordPress-based website contains hidden information that could expose corruption and human rights violations. The website features a unique table processing system that displays various government data, but our analysts suspect that the developers have hidden sensitive information within the table structures themselves. The site's administrators are known for their sophisticated obfuscation techniques, making it difficult to distinguish between legitimate public data and concealed evidence. Your mission is to investigate this website and uncover the hidden information by looking beyond the surface-level content and examining how the tables are processed and displayed - the truth might be hidden, waiting for someone with the right skills to reveal it. 15 min read
    • Smile at me My hard web challenge for GPNCTF 2025. 11 min read
    • Leaf I always think leaf ~= tea. Please allow remote to have some time to boot the browser. 6 min read
    • Everyone loves canteen food Welcome to the canteen's online menu, where you can check out the daily specials and their prices. But is everything as appetizing as it seems? 5 min read
    • vidplow We recently stumbled upon an exposed SVN server of a large multimedia corporation, containing some of their backend application and internal tooling code. However, the access keys seem to not be the ones used in production - the real ones should fetch us quite a high price though, if we manage to get our hands on them that is. Just one problem - the tech stack seems to be really obscure, and no one on our team seems to have any clue what the heck is going on. Can you take a look, and maybe find some vulnerabilities in this thing? 4 min read
    • KDF dream We've managed to insert ourselves into a secure channel between two covert agents, however we overplayed our hand and they have become suspicious that their channel is compromised. Realising that there is no way to restablish trust over the compromised network, Alice called for them to carry out a NIST Certified KDF protocol to generate a symmetric OTP, and then for them to use this to encrypt a physical message at a dead drop location. We want to control the message she leaves, can you influence their conversation to control what Bob reads at the dead drop? 9 min read
    • Air smeller I found this website where you can rate the smell of the air, after purification. Do you know a good purifier, maybe you can recommend some purifier to the people. 7 min read
    • Fantastic Doom Doctor Doom, the monarch of Latveria has made many doombots. You working with the Fantastic 4 have to access doombot machine and foil his plans of releasing doombots. 5 min read
    • Cash Memo I have a really hard time managing my cash, am afraid someone might steal my memos... 10 min read
    • Tar boom Within the Louvre Museum's intranet, there is a service that allows trusted users to upload .tar files and view their content. However, this service has been exploited by a hacker. He was able to retrieve crucial information about the Louvre's security, hidden within the flag.txt. 4 min read
    • Gamedev You've heard of rogue-likes, but have you heard of heap-likes? 5 min read
    • A Minecraft Movie I...AM STEVE! 9 min read

  • 2024

    3 items
    • CORS Playground An easy FCSC web challenge centered on browser cross-origin policies. 5 min read
    • Hoster You gained access to a Linux server. Can you also gain privileges? 4 min read
    • Photoeditor A medium CSCG web challenge built around ASP.NET Core and dynamic application behavior. 5 min read

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