# Task 2 - full-stack-developer (Security Audit)

## Task: Security Audit and Fixes

## Summary
Performed a comprehensive security audit of the Needyfy project and implemented critical fixes for authentication, authorization, input validation, rate limiting, and data protection.

## Key Changes

### New Security Utilities Created
- **`src/lib/auth.ts`** - Admin authentication with token-based sessions, permission checks
- **`src/lib/validation.ts`** - 20+ input validation and sanitization functions
- **`src/lib/rate-limit.ts`** - In-memory rate limiting with 4 presets

### Critical Fixes Applied
1. All 8 admin API routes now require authentication via `x-admin-token` header
2. Password comparison changed from plaintext to consistent hash comparison
3. Seed endpoint protected with super admin auth
4. Input validation and sanitization added to all API routes
5. Rate limiting added to auth, messages, community, orders, mcq endpoints
6. Admin frontend updated to send auth tokens on all API calls
7. 401 responses trigger automatic admin logout

### Files Modified (20 total)
- All admin API routes (8 files)
- Public API routes: orders, messages, community, mcq (4 files)
- Auth routes: admin/auth, auth (2 files)
- Store: added adminToken state
- Admin page: added adminFetch helper, 15+ fetch calls updated

## Remaining Issues (Documented)
- Base64 password "hashing" (needs bcrypt for production)
- IDOR vulnerabilities (needs server-side sessions)
- Hardcoded demo credentials (remove for production)
- Custom CSS injection risk (needs CSS parser)