Timeline

Timeline

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

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65 / 65 items

  • 2026

    38 items
    • Upcoming
      Talk at BSides Munich. How a manual SQLi hunt turned into an AI-assisted Joomla audit and multiple assigned CVEs for a university course.
    • Talk at the OWASP Stammtisch Karlsruhe. How a manual SQLi hunt turned into an AI-assisted Joomla audit and multiple assigned CVEs for a university course.
    • FFmpeg DVB subtitle parser heap buffer overflow via WTV file
    • FFmpeg Uninitialized heap memory read in the RSCC decoder
    • FFmpeg Uninitialized heap memory read in the Screenpresso decoder
    • FFmpeg Uninitialized heap memory read in the TIFF decoder
    • FFmpeg Heap out-of-bounds write in the CFHD decoder via AVI demuxing
    • SuiteCRM Authenticated SQL injection in the map_markers distance parameter
    • Final presentation for the course. How a manual SQLi hunt turned into an AI-assisted Joomla audit and multiple assigned CVEs for a university course.
    • FFmpeg Heap out-of-bounds write in the vf_quirc video filter
    • FFmpeg Heap out-of-bounds write in the PNG and APNG eXIf encoder
    • FFmpeg Integer overflow and heap out-of-bounds write in the MACE6 decoder
    • FFmpeg Uninitialized memory disclosure in the LCL/Zlib video decoder
    • FFmpeg Uncontrolled resource consumption in the IAMF demuxer
    • FFmpeg Heap out-of-bounds write in the vf_hqdn3d video filter
    • FFmpeg Out-of-bounds write via the TY demuxer and Shorten decoder
    • FFmpeg Out-of-bounds write in the TDSC video decoder
    • FFmpeg Out-of-bounds write in the vf_floodfill video filter
    • FFmpeg Out-of-bounds write in the vf_swaprect video filter
    • Firedancer Race condition in the netshred module
    • Talk at KITCTF. How a manual SQLi hunt turned into an AI-assisted Joomla audit and multiple assigned CVEs for a university course.
    • 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 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
    • Joomla CMS Authenticated blind SQL injection in com_finder
    • Joomla CMS Authenticated blind SQL injection in com_tags
    • Joomla CMS Privilege escalation through com_users batch task
    • 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
    • Talk at KITCTF. Introductory web security talk for KITCTF.
    • ChurchCRM Second-order SQL injection via FundRaiserEditor.php
    • ChurchCRM Authenticated blind SQL injection in SettingsUser.php
    • ChurchCRM Authenticated blind SQL injection in PropertyTypeEditor.php
    • ChurchCRM Authenticated SQL injection in MemberRoleChange.php
    • ChurchCRM Authenticated blind SQL injection in EventNames.php
    • ChurchCRM Authenticated blind SQL injection in PropertyAssign.php
    • ChurchCRM Authenticated blind SQL injection in SettingsIndividual.php
    • 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

    18 items
    • KITCTF #3 at GlacierCTF 2025 #3 at GlacierCTF.
    • My Flask App I created a Web application in Flask, what could be wrong? 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 Be careful, others might be able to find out your most sacred secrets! (Flag only consists of emojis surrounded by 'GPNCTF{...}') The remote instance is not deployed via Docker-compose but plain Docker, resulting in the bot URL to be 'localhost:3000' instead of 'bot_service:3000' and the challenge server being 'localhost:9222' instead of 'challenge_service:9222'. 11 min read
    • FluxKITtens #6 at Google CTF 2025 #6 at Google CTF as the FluxKITtens merger team (FluxFingers and KITCTF), qualifying for the Hackceler8 finals in Mexico.
    • DHM 2025 participation Participated in the DHM finals.
    • 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
    • CSCG 2025 top 10 global & DHM qualification Qualified for DHM again and finished top 10 globally.
    • 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
    • KITCTF #3 at SwampCTF 2025 #3 at SwampCTF.
    • 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

    9 items
    • KITCTF at SnakeCTF 2024 finals Qualified for and participated in the SnakeCTF finals in Italy.
    • KITCTF #3 at GlacierCTF 2024 #3 at GlacierCTF, qualifying for DHM 2025 as KITCTF team.
    • CORS Playground Perplexed by CORS? Our CORS Playground is your ideal solution. This intuitive and sleek platform lets you effortlessly learn and experiment with CORS policies. Perfect for unraveling the complexities of secure cross-origin requests. Dive in and clarify your CORS concepts! 5 min read
    • DHM 2024 #1 Placed #1 in the DHM finals.
    • Hoster You gained access to a Linux server. Can you also gain privileges? 4 min read
    • Photoeditor Recently I learned ASP .NET Core and boy, it's so magic! Dependency injection, dynamic routing, interfaces everywhere. But for me, it wasn't dynamic enough. So I extended the framework and now I got all the dynamic in the world I could wish for. That surely didn't introduce any vulnerabilities, right?", 5 min read
    • CSCG 2024 DHM qualification Qualified for DHM through CSCG.
    • Firedancer v1 audit competition Participated in the Firedancer v1 audit competition.
    • KITCTF #1 at SwampCTF 2024 #1 at SwampCTF.