Offical URL: https://www.hackforachange.org/

The UN SDG CTF is a dynamic, beginner-to-intermediate-friendly Capture The Flag competition inspired by the United Nations Sustainable Development Goals. Solve puzzles, exploit vulnerabilities, and tackle real-world scenarios, all while learning how technology intersects with global issues like climate action, clean energy, and digital inclusion. Expect a mix of web, crypto, forensics, and general hacking challenges

CTF events

NameWeight
Hack for a Change 2026 May: UN SDG 10.00
Hack for a Change 2026 March: UN SDG 324.21
Hack for a Change 2026 January: UN SDG 1514.38
Related tags: web nothing reversing javascript python crypto sss forensics misc forensic md5 base64 revesing gdb programming ftp wireshark