WEB APPLICATION PENETRATION TESTING
Web application penetration testing: find the flaws before someone else does
Manual web application testing to OWASP WSTG and ASVS, run by pentesters certified in OSCP and OSWA. We hunt the business-logic and access-control flaws a scanner misses, and prove each one with a working exploit.
WHY IT MATTERS
The most dangerous web flaws are the ones you cannot see in the code
A web app is exposed to the world 24/7, so it is the first thing an attacker probes. The worst vulnerabilities do not come from a single coding bug, they come from logic: who can see whose data, who can approve whose transaction, what happens when you change one parameter in a request.
One case from our tests: changing an ID in the URL let one client pull another client’s invoices. The scanner reported that endpoint as fine, because technically it responded per spec. Only a human noticed the missing check that the invoice belongs to the logged-in user.
WHAT WE CHECK
The full OWASP scope, not just the Top 10
We tailor scope to the stack and roles in the app. We test from the perspective of different privilege levels.
OUR APPROACH
We test by hand, from the perspective of a real user and attacker
A scanner checks single requests. We log in as different users and check whether the boundaries between them actually hold. That is where the flaws that cost the most are hiding.
We work gray-box: with test accounts and knowledge of the app we test wider and deeper than an outside attacker, in the same amount of time. We confirm every vulnerability with proof, not just a tool warning.
COMPLIANCE
A test that passes the audit and the client requirement
Web application testing is explicitly required by regulation and, increasingly, by enterprise customer contracts.
STANDARDS & CERTIFICATIONS
We work to recognized methodologies, not gut feeling
Every project is run by certified pentesters and based on public standards. That makes the result repeatable, auditable and comparable across vendors.
We share the full list of certifications and standards on request, together with a sample test scope.
HOW WE DO IT
A repeatable process based on PTES
EVIDENCE
Numbers behind every promise
Every test is run by certified pentesters, and we document the result with reproduction steps, evidence and a verified remediation path. Proof, not a promise.
KNOWLEDGE
Web application penetration testing in practice
What we actually test in a web application assessment
We run a web application test to OWASP WSTG and verify not only the classic vulnerabilities from the OWASP Top 10, such as injection, XSS or misconfiguration, but above all the business logic of the application. That is where the flaws no scanner understands hide, because they require knowing what the application is supposed to do.
We check authentication and session management, access control across roles and accounts, file handling, API integrations and the places where user input reaches the database, another user's browser or an external system. We confirm every vulnerability with a working proof, not just a tool alert.
Why access control flaws are the most common and most dangerous
The most serious web application incidents rarely come from an exotic flaw. Usually it is broken access control: a user sees another customer data, swaps an identifier in the URL and downloads someone else invoice, or an ordinary account performs an action reserved for an administrator. OWASP has placed this category at the top of its risk list for years.
A scanner will not find these, because confirming them requires understanding the roles and permissions in the application and deliberately trying to bypass them. That is why we test from the perspective of different accounts and roles, checking every permission boundary separately.
Black-box or with access: how to choose the model
We match the test model to the goal. In a black-box approach we mirror an anonymous attacker from the internet, which shows exposure well but misses what happens after login. In an approach with test accounts, that is grey-box, we reach the logic available to users and find authorization flaws invisible from the outside.
For an application with many roles and sensitive data we usually recommend grey-box, because it gives the best coverage-to-time ratio. We define the test accounts during scoping so the test reflects the real paths of your users.
What you get in the report and how to use it
The report contains every vulnerability with proof, a CVSS rating and reproduction steps, so your team can confirm the issue and start fixing it right away. On top of that we add an executive summary that explains the real business impact without technical jargon.
After fixes are implemented we run a retest and confirm in writing that the gap is closed. As a result the report is not just a document to file away but a concrete action list with confirmed effect that you can show a client or an auditor.
When to test a web application
The best moment is just before the application goes live for users, and after every significant change: a new feature, an integration, a change to how login works or a migration. Every such change creates a new attack surface that an earlier test did not cover.
Regardless of changes we recommend at least an annual cycle, and a more frequent one for applications processing personal data or payments. A regular test is also an explicit requirement of some regulations and a frequent part of due diligence in contracts with larger clients.
FAQ
Common questions
Do you test on production or a test environment?
Do you need accounts and documentation?
How is this different from a DAST scan?
Is the retest included?
RELATED
Related reading
- What does a penetration test cost? What goes into the price and what to watch for
- Penetration testing vs. vulnerability assessment: a clear guide to the difference
- Penetration test scope: the one page that decides whether the test was worth it
- Penetration test scope
- Why CVSS scores often miss the real threat
CASE STUDIES
Case studies in this area
REFERENCES
“The project was delivered professionally and on time, with a strong grasp of both technology and business. We were impressed by their cybersecurity expertise and partnership approach.”
