Security testing and the OWASP Top 10: where to start
You do not need to test everything at once. Start with the risks that show up most often and cause the most damage, then widen from there.
By Quality AboveAll · May 24, 2026 · 7 min read
Where this fits in the wider picture.
Security testing and the OWASP Top 10: where to start
We map the system before we touch it
Codebase, pipeline and risk assessed in week one.
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Every sprint ends with something running you can try.
Suites that gate every merge
Parallelised runs keep regression in minutes, not days.
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Use the OWASP Top 10 as your starting map, fix access control and injection first, and back automated scans with manual testing so the real risks surface.
Why the OWASP Top 10 is the right starting point
The OWASP Top 10 is a ranked list of the risks that hit web applications most often, built from real breach data by the team at OWASP. It is not a full security program, but it is the best place to begin because it points you at the issues most likely to bite.
Work the list in order of risk to your app, not top to bottom. For most teams, broken access control and injection are where the real exposure sits.
Start with access control and injection
Broken access control means a user reaching data or actions they should not. Test it by logging in as a low-privilege user and trying to touch another user's records by changing an ID in the URL or request body.
- Can a regular user hit admin-only endpoints?
- Can you read another account's data by swapping an ID?
- Are server-side checks present, not just hidden buttons?
Injection covers SQL, command, and similar attacks where input is treated as code. Send unexpected characters into every field and parameter and watch how the app responds.
If a single quote in a search box changes the result or throws a database error, you have a finding worth chasing.
Automate the scan, then test by hand
Automated scanners catch known patterns fast and should run on a schedule. But they miss business-logic flaws, like a checkout that lets you set a negative quantity for a refund. Those need a human who understands the application.
Pair scanning with manual review. Our exploratory testing approach finds the logic gaps that automated tools skip, and our API and contract testing catches the auth and validation holes that sit behind the UI.
Build security into the release, not after it
Security testing works best as a habit, not a one-off before launch. Add a baseline scan to your pipeline, retest every fix, and keep a short list of the checks that matter most for your app. Our security and penetration testing team runs the deep work and trains your developers on what to watch, so each release ships safer than the last. Not sure where your gaps are? Start with a testing audit.
Questions about this topic.
What is the OWASP Top 10?
A widely used list of the most critical web application security risks, maintained by the Open Web Application Security Project. It is a starting point for testing scope, not a complete security programme.
Can automated scanners cover the OWASP Top 10?
Partially. Scanners find known patterns like injection and misconfiguration, but access-control and business-logic flaws need a human attempting to chain findings into real exploitation.
How often should we run security testing?
Automated checks on every build, and a deeper manual test at least annually or after any significant architectural change. Threat surfaces change with your code, not with the calendar.
How ready is your product to ship and scale?
Answer 12 questions and get a maturity score across architecture, delivery, quality and security, plus the three things we would fix first. No email required to see your result.
Senior-led QA,embedded in your workflow.
Often less than one full-time hire. Book a free 30-minute testing audit and we'll show you exactly where the risk is hiding.