# Challenges

Pathfinder

A directory listing tool reveals file sizes and names. Can you find the flag file before time runs out?

Hidden Service

Somewhere in the dark web, a hidden service awaits discovery.

FTP Investigation

An FTP server holds secrets that someone tried to hide.

DNS Traffic

A DNS server is running. What can you learn from it?

Network Checker

A handy network utility that pings hosts for you. What happens when the input is not just an IP address?

Regex

Ten rounds of pattern matching. How sharp are your regex skills?

Maze

Navigate through a series of mazes. Speed and precision are key.

Cursed Math

Cursed math equations hidden behind strange characters. Can you keep up?

Mind Mapping

A web-based calculator and data transformer. Multiple operations are available — which ones can you abuse?

Math Challenge

Log Poisoning

An Apache web server with a curious search feature.

Librarian 9

The most heavily guarded library yet. HTML encoding locks down almost everything. Almost.

Librarian 8

Regex-based filtering protects the librarian. But regex has its edge cases.

Librarian 7

A different kind of library — this one uses Python. The form input is rendered in a way that reveals more than intended.

Librarian 6

Protocol-based restrictions guard the library. But the conditional logic has a gap.

Librarian 5

URL-encoded paths go through a decoding step before validation. Does the order of operations matter?

Librarian 4

The librarian strips dangerous keywords from your request. But does it strip them thoroughly enough?

Librarian 3

The library system supports multiple protocols for reading files. Some of them are more powerful than others.

Librarian 2

The librarian learned to block certain characters. Can you still convince it to read forbidden texts?

Librarian 1

The librarian fetches books by name. What else can you ask it to read?