아주대학교 데이터보안·활용융합 해킹방어대회 (COSS)
OrganizerAjou University
Team참치김치찌개
About
OFFENSIVE WEB SECURITY
nullbyte
High school student focused on Web2 CTF and bug bounty.
Play CTF with Team Fermion.
Web2
Bug Bounty
CTF
Bug Bounty
Hall of Fame
Public recognition from bounty programs
🏆️2023 Kakao Bug Bounty Hall of Fame
🏆️2023 Kakao Bug Bounty Special Contributor
🏆️2025 Kakao Bug Bounty Hall of Fame
🏆️2025 Dreamhack Bug Bounty Hall of Fame
🏆️2026 Kakao Bug Bounty Hall of Fame
🏆️2026 NASA Bug Bounty Hall of Fame
🏆️2026 Jenkins Bug Bounty Contributor
🏆️2026 DNFSB Bug Bounty Hall of Fame
Kakao
Kakao Bug bounty reports
KV-2023-91
KV-2024-156
KV-2025-163
KV-2025-176
KV-2026-234
NASA
Bugcrowd reports
0dae15fd... (P1)
23c849e6... (P2)
Dreamhack
PatchDay reports
#823
#924
Goorm
PatchDay reports
#806
#809
KERIS
Education services
NEIS Plus Internal Security Audit Team
CVE & KVE
Public + Private
CVE-2025-50938
KVE-2025-0379
DNFSB
Defense Nuclear Facilities Safety Board
d2ec795e... (P3)
6366f50d... (P4)
CTF
순천향대학교 정보보호 페스티벌 (YISF)
OrganizerSoonchunhyang University
Team-
KAIST HackQuest
OrganizerKAIST
Team-
Cyber Conflict Exercise (CCE)
OrganizerNational Intelligence Service
Team해킹의 정석
LG U+ Security Hackathon
OrganizerLG U+
Team대성없는대성팀
Whitehat Contest
OrganizerMinistry of National Defense
TeamZerobyte
SCA CTF
OrganizerSCA
Team'혜성'처럼 빛날 'Null' 응원해!
Unifox CTF (UNICON)
OrganizerUnifox
Team-
Codegate CTF
OrganizerMinistry of Science and ICT
Team-
Midnight Flag CTF
OrganizerESNA
Team"nullbyte" looking for a GF
TRX CTF
OrganizerTheRomanXpl0it
TeamFermion
Author
Dreamhack
- Letter Cloud (web)
- My Best Friend (web)
- Dream protocol (misc)
Code With
Node.js
Python
TypeScript
HTML
CSS
React
Electron
Express
NestJS
MongoDB
GitHub
Git