$ ctf42

#filter-bypass CTF challenges

7 CTF challenges using filter-bypass from 7 CTFs (2019–2026), 7 with writeups. Mostly Web (71%) and Pwn (14%).

Web · 5 Pwn · 1 Misc · 1

Often combined with

#ssti 2 #jinja2 2 #command-injection 2 #type-juggling 1 #sqlite-injection 1 #web 1 #python-eval-injection 1 #glob-expansion 1 #sql-injection 1 #union-based 1

Challenges

Filter and sort these in the challenge browser →

Challenge CTF Weight Category Has
MissingFlavortext DiceCTF 2021 24.82 Web files wu 3
super-secure-translation-implementation DamCTF 2021 24.43 Web files wu 3
wayyang SEETF 2022 – Pwn files wu 3
20000 Codegate 2019 Quals – Misc files wu 3
miniblog++ zer0pts 2022 35.97 Web files wu 1
Limited_1 WolvCTF 2025 47.25 Web files wu 1
Duck_Nettool_Revenge V1T 2026 22.14 Web files wu 1