# Remaining Security Issues

1. ~~**No rate limiting on `/reauth`** — brute-force possible via export dialog~~ ✅
2. ~~**No Content Security Policy (CSP)** header — XSS could leak crypto key from sessionStorage~~ ✅
3. **Crypto key in sessionStorage (extractable)** — necessary for refresh persistence, but XSS can steal it. HttpOnly cookie + service worker is more secure but complex
4. ~~**No session rotation** — same token until logout; if leaked, valid for 24h~~ ✅
5. **No 2FA** — opted out of TOTP implementation
6. ~~**Password generator modulo bias** — `c.charAt(arr[i] % c.length)` has slight bias when c.length does not divide 2^32; not practically exploitable~~ ✅