Web application penetration testing.
Tested to OWASP OTGv4 and ASVSv4 — APIs included. You get findings ranked by severity and a clear plan to fix them.
We secure the Czech tech companies that made it globally.
Web application penetration testing
Your web application is the part of your business anyone on the internet can reach — which makes it the first thing an attacker probes. Web application penetration testing tests it the way they would: by hand, chaining real weaknesses into a working attack, not just flagging what a scanner recognises. Every engagement runs against the OWASP standards — the OWASP Testing Guide (OTGv4) or the Application Security Verification Standard (ASVSv4) — so coverage is defined and repeatable, not down to one tester's habits.
API testing is not a separate product — it's covered under the same web-application methodology (ASVS V13 explicitly covers APIs and web services).
Two ways to test, matched to your risk
The right test depends on what the application is worth to an attacker and what you need to prove. We'll point you to the right one on a scoping call — but here's the shape of the choice.
OWASP OTGv4
A broad, consensus-based assessment of web-app risk. Run it as a focused OWASP Top 10 pass when you need a fast read on the most common, most exploited weaknesses — or as a comprehensive test of the full guide when you want the whole surface covered.
OWASP ASVS — risk-based levels (v4 & v5)
- Level 1 — Opportunistic: common vulnerabilities, for apps that don't process valuable data or need an initial screen.
- Level 2 — Standard: for apps handling valuable data where a breach causes real financial or reputational damage. (Most business apps land here.)
- Level 3 — Advanced: for business-critical, regulated, or high-assurance systems — resists targeted, advanced attacks.
We verify against either ASVSv4 or the latest ASVS v5 — the same L1–L3 risk levels apply, and v5 also enables white-box, source-assisted verification.
Test a single module or the whole application; black-box or grey-box.
Not sure which level applies? That's what the scoping call is for.
How a test runs
Every web application penetration test follows the same three stages — so you know exactly what you're paying for.
Information gathering
We map the web application's real attack surface — the runtime, server, framework, libraries, and the dependencies you may have forgotten are exposed. Most engagements turn up entry points the owner didn't know were reachable.
Identifying & exploiting vulnerabilities
We test the application's own security mechanisms — authentication, authorization, session handling, input validation, business logic — against OTGv4 / the OWASP Top 10 in full, by hand. Where a scanner stops at "possible", we confirm it by exploiting it.
Analysis & impact
A finding only matters if it leads somewhere. We chain what we find to show how far an attacker actually gets, and rate each issue by real-world impact (CVSSv3) — so you fix what matters first, not whatever a tool ranked highest.
What you get
A report in four parts: a scope recap, a management summary with an expert opinion on your security standing, an audit-findings checklist sorted by severity, and detailed findings — each with description, impact, CVSSv3 severity, and a concrete proposed fix. Every finding is peer-reviewed so your team can reproduce and fix it fast.
Every test is run by certified senior specialists — no junior hands learning on your systems.
Want to see what our report looks like? We'll send you a sample.
Use the test results toward NIS2, DORA, ISO 27001, and PCI-DSS.
Pricing
A web-application test is typically scoped by application size and the chosen depth (OTG vs ASVS level).
We'll confirm scope and price on a short call.
Our insight.
You use ORM in 98% of database interactions? We will find those 2% and hack you right there!
Frequently asked, always answered.
Do you test in production or a staging environment?
Either. A test environment lets us go harder without operational risk; production gives the most accurate picture. We agree which on the scoping call, and where we test production we coordinate timing and have your operations team on standby.
Why are web applications often targets of attacks?
Web applications are a common target, simply, because of accessibility. To allow for any user around the globe to connect with online services, this open exposure also allows for attackers to have that same ease of access.
Will you fix the problems? Can I retest once they are fixed?
We make industry best-standard recommendations for each vulnerability, but we don't implement the fix ourselves — that keeps us an independent third party, and lets us retest once your team has applied the solutions.
What will be included in the test report?
A report includes the list of vulnerabilities discovered with severity rating, a management summary that ties them to business risk, and a technical write-up so developers can reproduce and correct the issues.
What is the difference between a vulnerability scan and a penetration test?
A penetration test attempts to find and exploit security vulnerabilities to improve or prove the security of a system — often manually chaining one or more findings. A vulnerability scan finds known vulnerabilities but cannot combine or exploit them to further verify security.
Let's talk it through.
Tell us what you need tested — we'll set up a no-obligation call and propose a scope.
Book a free consultation ›