Misc Hacking Challenges

CTF miscellaneous & scripting challenge writeups by event and year

Miscellaneous, scripting, pyjails, and esoteric challenge writeups from Google CTF, DEF CON, picoCTF, and other global competitions. Organized by year and event.

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2025 Challenges

Google CTF 2025

Google CTF 2025

Jailbreak

Easy

Category: Misc · Points: 110 · Solves: 590

A Python PyJail interactive shell that blocks access to `import`, `os`, `sys`, and quotes. Escape the jail using subclasses references to read files.

Python JailSandbox EscapeSubclassesBuiltins

Writeup →

HTB Cyber Apocalypse 2025

HTB Cyber Apocalypse 2025

Regex-Game

Medium

Category: Misc · Points: 230 · Solves: 290

Write a single regular expression under 40 characters that matches valid mathematical equations but rejects maliciously injection vectors.

Regular ExpressionsInput ValidationConstraints Bypass

Writeup →