Summary NexaVault is a mock internal dashboard app that gates an "Admin Vault" panel behind a role claim in a JWT. The app issues a user-role token on login, stored in the nx_access cookie, and trusts the claims inside it without properly re-verifying the signature on every request. Recon Logged in as a normal user ( strawhat ) and captured the request to /famctf/dashboard : Cookie: nx_access=eyJ…
