This document outlines the security measures implemented in the MindMender application to protect user data and prevent common web vulnerabilities.

• Supabase Auth: Secure user authentication with JWT tokens
• Row Level Security (RLS): Database-level access control
• Middleware Protection: Route-based authentication checks
• Session Management: Secure cookie handling with proper flags

• XSS Protection: HTML escaping and sanitization
• Email Validation: Regex-based email format validation
• Password Strength: Multi-criteria password validation
• Input Length Limits: Prevents buffer overflow attacks

• X-Frame-Options: Prevents clickjacking attacks
• X-Content-Type-Options: Prevents MIME type sniffing
• Referrer-Policy: Controls referrer information
• Permissions-Policy: Restricts browser features

• Auth Endpoints: 5 requests per 15 minutes per IP
• In-Memory Storage: Simple rate limiting (upgrade to Redis for production)

• HttpOnly: Prevents XSS access to cookies
• Secure Flag: HTTPS-only cookies in production
• SameSite: CSRF protection

• Variable Validation: Required environment variables checked at startup
• Format Validation: Supabase URL and key format validation
• Error Handling: Graceful handling of missing configurations

-- RLS is enabled on all tables
-- Policies implemented:
- Users can view all profiles (public data)
- Users can only update their own profile
- Users can insert their own scores
- Users can view all scores (for leaderboards)

// next.config.ts
headers: [
  { key: 'X-Frame-Options', value: 'DENY' },
  { key: 'X-Content-Type-Options', value: 'nosniff' },
  { key: 'Referrer-Policy', value: 'origin-when-cross-origin' },
  { key: 'Permissions-Policy', value: 'camera=(), microphone=(), geolocation=()' }
]

Issue: All email signups failing with "invalid email" error Impact: Users cannot create accounts Workaround: Manual user creation via database Fix Required: Configure Supabase Auth settings in dashboard

Issue: Supabase password protection disabled Impact: Users can use compromised passwords Fix Required: Enable in Supabase dashboard under Auth settings

• XSS protection
• Input validation
• Authentication middleware
• Database RLS policies
• Security headers
• Rate limiting
• Cookie security
• Environment validation
• Password strength validation
• Error message sanitization

• Supabase email validation configuration
• Enable leaked password protection
• Production rate limiting (Redis)
• Content Security Policy (CSP)
• API rate limiting
• Audit logging

• Two-factor authentication
• Account lockout policies
• Security monitoring
• Penetration testing
• Dependency vulnerability scanning
• Automated security testing

# Required for production
NODE_ENV=production
NEXT_PUBLIC_SUPABASE_URL=https://your-project.supabase.co
NEXT_PUBLIC_SUPABASE_ANON_KEY=your-anon-key
SUPABASE_SERVICE_ROLE_KEY=your-service-role-key

• Enable email confirmation
• Configure password requirements
• Enable leaked password protection
• Set up email templates
• Configure redirect URLs

• Set up error tracking (Sentry)
• Monitor failed login attempts
• Track rate limit violations
• Log security events

// Consider adding CSP
'Content-Security-Policy': "default-src 'self'; script-src 'self' 'unsafe-inline'"

1. XSS: Try injecting <script> tags in forms
2. CSRF: Test form submissions from external sites
3. SQL Injection: Attempt SQL injection (should be blocked by Supabase)
4. Rate Limiting: Make multiple rapid requests
5. Authentication: Test protected routes without login

• ESLint security rules
• Dependency vulnerability scanning
• SAST (Static Application Security Testing)

For security vulnerabilities or concerns:

1. Create a private issue
2. Email security concerns
3. Follow responsible disclosure

• OWASP Top 10
• Next.js Security
• Supabase Security
• React Security

Last Updated: October 2024 Version: 1.0