Web application security: attacks you cannot ignore and how to test for them

Web application security is the practice of keeping a web application resilient against attackers — and it is a moving target, because the application itself is always changing. The OWASP Top 10 has codified the most prevalent risks for years, and it remains the clearest map of where to focus.

The attack classes that keep showing up

Broken access control, injection flaws such as SQL injection, cross-site scripting (XSS), and security misconfiguration are the recurring offenders. They persist not because they are clever, but because they are easy to introduce and easy to overlook when an application is growing quickly.

Why attackers win the default game

Most applications are not attacked because they are uniquely insecure — they are attacked because they are reachable and the attackers are automated. Thousands of requests scan the internet continuously, looking for the lowest-hanging fruit. Coverage, not cleverness, is what keeps an application out of that bucket.

Testing against the real thing

Static analysis can point at a line of code; it cannot tell you whether an attacker can actually reach and exploit it. Dynamic application security testing exercises the live application and verifies each finding, which is precisely the evidence you need to triage with confidence.

A defensible posture

Secure design, least-privilege access control, input validation, and security headers are the foundation. Continuous dynamic testing is the verification layer that tells you whether the foundation still holds after every change you ship.