This page may contain stale information. Last updated: 2026-05-04
Definition
Web security encompasses the practices, technologies, and policies used to protect websites, web applications, and web services from unauthorized access, attacks, and data breaches.
Key Threats
- SQL Injection: Malicious database queries
- Cross-Site Scripting (XSS): Injecting malicious scripts
- Authentication Bypass: Circumventing login mechanisms
- Remote Code Execution (RCE): Executing arbitrary code on servers
- Supply Chain Attacks: Compromising dependencies
2026 Critical Incident
cPanel Vulnerability (CVE-2026-41940)
- Authentication bypass allowing full server control
- Millions of websites potentially affected
- Exploitation occurred before patches available
- “Bug of the year” designation by security researchers
Best Practices
- Regular Updates: Keep all software patched
- Security Headers: Implement CSP, HSTS, X-Frame-Options
- Input Validation: Sanitize all user inputs
- HTTPS Enforcement: Encrypt all traffic
- Web Application Firewalls (WAF): Filter malicious traffic