OWASP Top 10: Use the Risk List to Improve a Web App

The OWASP Top 10 is an awareness document that groups important web application security risks. It can help a team start a review, but it is not a complete security standard or proof that an application is safe.

Check the edition before using a checklist

The Top 10 changes over time. OWASP lists the 2025 edition as the current released version; older articles and training material may still refer to 2021. Confirm the edition before mapping controls or writing a report. See the official OWASP Top 10 project page.

Turn categories into tests

For access control, ask whether one user can read or change another user's record by altering an identifier. For injection, verify that database queries use parameterized values and that output is encoded for its destination context. For configuration, review debug modes, default accounts, headers and exposed administration endpoints.

For vulnerable components, inventory direct and transitive dependencies and identify who owns updates. For authentication, review recovery flows, session invalidation and rate limits, not just the login form. The right test depends on the application and its threat model.

Use evidence and authorization

Test only systems you own or are explicitly authorized to assess. Use a staging copy and synthetic data when a test could alter records. Record the affected route, preconditions, impact and a safe reproduction instead of pasting unredacted secrets into a ticket.

Fixes should be tied to code and configuration changes, then retested. Use the Top 10 as a way to start conversations and organize review tasks; use a broader verification process for an actual security assessment.