Hello. This is my digital garden. I may document my discoveries, cheatsheets, solutions and thought process to CTF challenges as well as all things in general in the form of writeups here.https://shirajuki.js.org/https://shirajuki.js.org/blog/pyjail-cheatsheet/https://shirajuki.js.org/blog/pyjail-cheatsheet/Thu, 04 Sep 2025 00:00:00 GMThttps://shirajuki.js.org/blog/equinor-ctf-2024-shop-6/https://shirajuki.js.org/blog/equinor-ctf-2024-shop-6/🔥 Shop 6 🔥was a web challenge and one of six fire challenges in Equinor CTF 2024, authored by null. To solve this challenge, it was necessary to make use of Next.js Server Actions’ trait of being publicly accessible to the client. Additionally, there was a logical flaw in implementing the item purchasing functionality, where Server Actions acted as closures, essentially leading to a desynchronization between the user’s state and the database.Sun, 10 Nov 2024 00:00:00 GMThttps://shirajuki.js.org/blog/omegapoint-julectf-2023/https://shirajuki.js.org/blog/omegapoint-julectf-2023/Following the success of our internal security Capture The Flag competition held in October, I was once again entrusted with organizing a Capture the Flag event for Omegapoint. However, this time, it was designed to be open externally for everyone!Wed, 17 Jan 2024 00:00:00 GMThttps://shirajuki.js.org/blog/omegapoint-ctf-2023/https://shirajuki.js.org/blog/omegapoint-ctf-2023/During the Cybersecurity Awareness Month 2023, I was handed the awesome responsibility of organizing Omegapoint Norway’s very first internal security Capture The Flag (CTF) competition, extending the invitation not only to our Norwegian employees but also to our colleagues in Sweden...Mon, 15 Jan 2024 00:00:00 GMThttps://shirajuki.js.org/blog/rsxc-2021/https://shirajuki.js.org/blog/rsxc-2021/Here is my write-up of the challenges of the company River Security's capture the flag advent calendar, River Security Xmas Challenge (RSXC), for 2021.Sun, 26 Dec 2021 00:00:00 GMThttps://shirajuki.js.org/blog/equinor-ctf-2021/https://shirajuki.js.org/blog/equinor-ctf-2021/Heres a small writeup on the challenges I solved for Equinor CTF 2021 with team Corax :) I was quite busy the weekend of this CTF and didn't get to really enjoy the CTF throughly as much as I wanted. The challenges were pretty fun to work on together with the team nonetheless!Sun, 31 Oct 2021 00:00:00 GMThttps://shirajuki.js.org/blog/htb-osint-challenge/https://shirajuki.js.org/blog/htb-osint-challenge/The challenge description is: Yummy Crusty Pizza have been working on their secret recipe for over two decades, serving only the best pizza in the city. A hacker recently broke into their OLD database and dumped their recipe online, can you retrieve it?Sun, 28 Feb 2021 00:00:00 GMT