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
• DOMPurify 3.2.3 Bypass
• More to be verified… (^v^)

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