@sync-in/server vulnerable to TOTP Brute-Force via `POST /api/app/sync/register`

Affected component: Sync-in Server v2.3.0, POST /api/app/sync/register. Required attacker capability: Valid login and password for a TOTP-enabled account with desktop sync permission. Summary POST /api/app/sync/register accepts credentials and a TOTP code to register a desktop sync client. In the...