OWASP Top 10

One-Liner

A regularly updated list of the 10 most critical web application security risks.

What It Is

A consensus document from the Open Worldwide Application Security Project (OWASP) that highlights the most prevalent and impactful security vulnerabilities in web applications. It serves as a foundational guide for developers and security professionals.

Why It Exists

To raise awareness about common web application security risks and provide guidance on how to prevent them, thereby improving overall web security.

How It Works

The list is compiled through community effort, analyzing data from security researchers, penetration testers, and organizations worldwide. Each item on the list includes a description of the vulnerability, potential impact, and mitigation strategies.

Tradeoffs

Pros

Provides a clear, prioritized list of risks.
Serves as a great starting point for secure development and testing.

Cons

Not exhaustive; it’s a “top 10,” not a complete security checklist.
Risks can change over time, requiring updates.

Failure Modes

Ignoring the OWASP Top 10 can lead to easily exploitable vulnerabilities in web applications.
Focusing only on the Top 10 and neglecting other security best practices.

Interview Traps

Not being able to name a few common vulnerabilities from the list (e.g., Injection, Broken Authentication, XSS).
Not understanding how these vulnerabilities are exploited and how to prevent them.

Real-World Usage

Used by developers as a secure coding guide.
Used by security testers as a checklist for penetration testing.
Integrated into many compliance and regulatory frameworks.

Anti-Patterns

Assuming that addressing the OWASP Top 10 makes an application fully secure.
Treating it as a “check-the-box” exercise without understanding the underlying risks.

SQL Injection
Cross-Site Scripting (XSS)
Broken Access Control
Security Best Practices