A security breach does not just cost money — it costs trust. For businesses in Malta and across Europe, where GDPR imposes strict data protection obligations, a compromised website can result in regulatory fines, customer churn, and lasting reputational damage. The good news is that most attacks exploit known vulnerabilities with known solutions. Here are the practices every web application should implement.
Transport and Infrastructure Security
HTTPS is non-negotiable. Every page, every asset, every API call should be served over TLS. Use HSTS (HTTP Strict Transport Security) headers to prevent downgrade attacks. Configure your server to support only TLS 1.2 and 1.3 — older versions have known vulnerabilities. Set up automatic certificate renewal through Let's Encrypt or your hosting provider to avoid expired certificates breaking your site.
Implement security headers across your application. Content-Security-Policy (CSP) prevents cross-site scripting by controlling which scripts can execute. X-Frame-Options prevents clickjacking. X-Content-Type-Options prevents MIME-type sniffing. Referrer-Policy controls what information is sent in the Referer header. These headers are simple to configure and block entire categories of attacks.
Authentication and Access Control
- Hash passwords properly: Use bcrypt, scrypt, or Argon2 with a unique salt per user. Never store passwords in plain text or use outdated algorithms like MD5 or SHA1.
- Implement multi-factor authentication: Offer TOTP-based 2FA for user accounts, and require it for administrative access. SMS-based 2FA is better than nothing but vulnerable to SIM swapping.
- Apply the principle of least privilege: Every user, service, and API key should have only the minimum permissions required. An admin account compromise is catastrophic; a read-only account compromise is manageable.
- Rate limit authentication endpoints: Brute force attacks against login forms are common. Implement rate limiting, account lockout after failed attempts, and CAPTCHA for repeated failures.
Input Validation and Data Handling
Never trust user input. Validate and sanitise every piece of data that enters your application — form submissions, URL parameters, API request bodies, uploaded files, and cookies. Use parameterised queries for database operations to prevent SQL injection. Encode output to prevent cross-site scripting (XSS). Validate file uploads by checking MIME types and file contents, not just file extensions.
For APIs, validate request bodies against a schema before processing. Reject malformed requests early rather than letting invalid data propagate through your system. Use libraries like Zod (TypeScript), Joi (Node.js), or Laravel's validation rules (PHP) to define and enforce data schemas.
Dependency and Supply Chain Security
Modern web applications depend on hundreds of third-party packages. Each one is a potential attack vector. Run automated vulnerability scans on your dependencies using tools like npm audit, Snyk, or GitHub Dependabot. Update dependencies regularly — but test thoroughly after updating, as breaking changes can introduce bugs. Lock your dependency versions with a lock file and review changes to transitive dependencies during updates.
Monitoring and Incident Response
Security is not a one-time setup. Monitor your application logs for suspicious activity — unusual login patterns, spikes in error rates, or unexpected API calls. Set up alerts for critical events. Have an incident response plan that documents who to contact, how to contain a breach, and how to communicate with affected users. Under GDPR, you have 72 hours to report a data breach to the relevant supervisory authority. At Born Digital, we build security into every project from day one, helping Malta and European businesses protect their digital assets and meet regulatory obligations.