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Every CTF
2025from public repositories

Holiday Hack Challenge Act Iii 2025

18 challenges with 18 published solutions between them. The writeups for this event were found in public repositories. Each link is pinned to the commit it was read from.

Where these writeups live

Uncategorised17

The upstream scoreboard did not say, so neither do we.

Reverse engineering1

Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.

Other 2025 events