About

whoami

I’m Sean, a secondary school student from Hong Kong who’s interested in all things programming. I’m part of the CTF team Black Bauhinia, and have done independent security research. Other than infosec, I also enjoy being a hobbyist full stack developer and a competitive programmer.

Research

• CVE-2025-23207 - KaTeX
• CVE-2025-26791 - DOMPurify Writeup
• CVE-2025-27108 - DOM Experssions(SolidJS) Writeup
• CVE-2025-27109 - SolidJS Writeup

Projects

• DBS Mother’s Choice Website
• Binary Search Game

Awards

• Finals & 1st place in heats - HKCERT CTF 2024 Secondary Division
• Silver - Hong Kong Olympiad in Informatics Junior 2024
• 8th Individual - AlpacaHack Round 2 (Web)
• First place - NuttyShell CTF 2024 Secondary Division
• Second place - HKCERT CTF 2023 Secondary Division