Level 10 - Registrar Chain of Custody

Category: Multi-step chaining, Web logic, Crypto, Forensics | Difficulty: Very Hard

The final level chains multiple toy flaws and encoding steps into one deterministic puzzle path.

What participants receive: /api/level10, /api/level10/pieces?ticket=... or /api/level10?action=pieces&ticket=..., /api/level10/submit or /api/level10?action=submit

Objective: Reconstruct the final phrase and obtain the final flag.

curl https://ctf-trpl-wbi.vercel.app/api/level10
curl "https://ctf-trpl-wbi.vercel.app/api/level10?action=pieces&ticket=<edited-ticket>"
curl -X POST "https://ctf-trpl-wbi.vercel.app/api/level10?action=submit" \
  -H "content-type: application/json" \
  -d '{"answer":"<your-answer>"}'