What are the most important web application security requirements?

Start with documented ownership, threat modeling, least-privilege authorization, strong authentication, secure sessions, safe input and output handling, secrets and dependency controls, secure configuration, testing, logging, monitoring, recovery, and patching.

What is the difference between a security checklist and the OWASP Top 10?

The OWASP Top 10 is an awareness document about major web application risk categories. A security checklist is an implementation and verification tool. Use a standard such as OWASP ASVS when you need detailed, testable requirements.

How often should web application security testing be performed?

Run relevant automated checks whenever code, dependencies, or infrastructure change. Repeat manual testing after significant changes to authentication, authorization, integrations, architecture, or sensitive workflows, and before high-risk releases.

Is a vulnerability scanner enough for a web application security audit?

No. Scanners can identify common weaknesses, but they often miss object-level authorization errors, tenant isolation failures, workflow abuse, race conditions, and chained attacks. Combine automation with manual review and retesting.

Is a web application firewall enough to secure an application?

No. A web application firewall can filter some malicious traffic, but it cannot replace correct authorization, secure code, dependency management, hardened configuration, testing, monitoring, and incident response.

What evidence should a security assessment retain?

Keep the scope, asset inventory, requirements, threat model, tool reports, manual test results, finding tickets, risk decisions, fix references, retest results, release approvals, and any approved exceptions.