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Every CTF
2021weight 22.44vulnfreak

WORMCON 0x01

29 challenges with 33 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.

Full task list on CTFtime

Forensics10

Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.

Web7

Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.

Cryptography5

Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.

OSINT5

Answer a question about the real world from public sources. The work is pivoting between identifiers, not exploiting anything.

Misc2

Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.

Other 2021 events