Perform a web application pentest

From input field to authorization: we look for paths within your web application that your developers did not foresee. All findings come with proof and a solution. This way you can be certain that your web application is truly secure.

Web application pentest

Web application pentest: tested the way an attacker does

Our ethical hackers manually test your web application, from login to the underlying APIs. They search for the authorization, business logic, and configuration flaws that scanners miss, and deliver a report with proof, remediation steps, and a retest.

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Retest standard included·Reporting within 5 working days·According to the CCV certification mark

CCV-gecertificeerde pentester van Warpnet aan het werk aan een webapplicatie pentest

SOME OF OUR CLIENTS

N8nYdenticNieuw WoelwijckRijksoverheidEffectoryVentolinesPatchmanager
Warpnet webapplicatie pentest illustratie

How does a web application pentest by Warpnet work?

Every specialist can record risks. Fix them? That is our specialty.

  1. We work with you to determine the scope, target environment and desired results of the pentest.
  1. We collect data about the target using public sources (this is known as OSINT).
  1. We scan for recent and current vulnerabilities using
    AI scanners and manual inspection.
  1. Our ethical hackers exploit vulnerabilities, which allows them to gain access to systems and data.
  1. You will receive a detailed report in which we explain all vulnerabilities along with next steps.

How Warpnet one step further is going

  1. We support you in remedying the risks identified during the test by offering technical insight and advice.
  1. After the recommendations have been applied, we will perform a retest, which
    ensures that the vulnerabilities have truly been resolved.
35+
Driven specialists
750+
Happy customers
5.000+
Assessments carried out
100.000+
Vulnerabilities discovered

Why Warpnet for your web application pentest?

CharacteristicWarpnetOther parties
ApproachManually tested, with AI tooling as an acceleratorAutomatic scans, exploit attempts
Roles & permissionsTested with multiple roles for unauthorized accessOnly the default user role
Business logicOrdering, payment and registration processes tested for abuseCannot be found with a scanner
APIsUnderlying APIs and integrations includedOnly what is visible in the browser
Presentation of EvidenceScreenshots, requests and working attack scenariosOutput from automatic scanners
ReportingExecutive summary and developer reportTechnical report without context
RetestIncluded so you can be sure fixes workNot included or available at an additional cost

Certifications & methodologies

CCVOSCPOSSTMMPTESOWASPMeow

Penetration test types for environments such as:

Web application pentest

  • Realistic attack scenarios that expose vulnerabilities from the OWASP Top 10, CWE, and SANS Top 25
  • Fixes are quickly validated using clear proofs of concept (PoCs) for developers and a retest
  • Audit-ready for ISO 27001, SOC 2, PCI DSS, DigiD, and BIO; conducted in accordance with NIST SP 800-115

Mobile application pen test

  • iOS and Android apps tested for insecure storage, API abuse, and errors in app logic
  • Specific remedial steps to better protect sensitive user data
  • In accordance with the OWASP Mobile Top 10, PTES, CVSS, and the GDPR

API Penetration Test

  • Shadow and zombie APIs mapped to prevent data leaks and unauthorized access
  • Authenticated, manual testing of REST, SOAP, and GraphQL APIs and backend integrations
  • Following the OWASP API Security Top 10, PCI DSS, SOC 2, and the GDPR

Cloud pentest

  • AWS, Azure, and GCP environments tested for misconfigurations, privilege escalation, and exposed services
  • Step-by-step recovery plan for a demonstrably secure cloud environment
  • Following the OWASP Kubernetes Top 10, CIS Benchmarks, NIST, ISO 27001, SOC 2, and PCI DSS

Network pentest

  • On-premises and hybrid networks tested for misconfigurations, lateral movement, and privilege escalation
  • Risk-prioritized recommendations that IT and security teams can get started with immediately
  • Standards: NIST SP 800-115, PTES, CIS Controls, ISO 27001, and BIO

AI and LLM pentest

  • Vulnerabilities in AI applications, chatbots, and LLM pipelines exposed
  • Tested for, among other things, prompt injection, model manipulation, data leaks, and multi-stage exploit chains
  • Threat modeling and concrete remediation advice, aligned with ISO/IEC 42001, the EU AI Act, SOC 2, and the GDPR

Pentest services for industries such as:

Fintech

  • Customer portals and payment flows tested for transaction manipulation and business logic flaws
  • Concrete fixes and demonstrable compliance with PCI DSS, ISO 27001, SOC 2, and DORA
  • Standards: OWASP, PTES, CVSS

Care

  • Patient portals and healthcare applications tested for access to other patients' records (IDOR)
  • Detecting hidden exposure of medical data and demonstrating compliance with NEN 7510 and the GDPR
  • Standards: OWASP, PTES, NIST, CVSS

E-commerce & Retail

  • Webshops and checkouts tested for price manipulation, discount code abuse, and BOLA/IDOR risks
  • Supporting developers with guided remediation and compliance for PCI DSS, ISO 27001, and SOC 2
  • Standards: OWASP, PTES, CVSS

SaaS & Technology

  • Multi-tenant platforms tested for data leaks between customers and weaknesses in roles and permissions
  • Pentests per release or at fixed moments in your development cycle, demonstrably compliant with ISO 27001 and SOC 2
  • Standards: OWASP, PTES, CVSS, NIST SP 800-115

Linked to laws and standards such as:

AVGISO 27001PCI DSSDigiDBIODORANIS2NEN 7510

Success story: Patchmanager

Developers of cable and asset management solutions

2024

Start of the collaboration

3

Black box pentests as a starting point

24/7

Monitoring by the Warpnet SOC

The challenge

Right in the middle of the process toward ISO 27001 certification, Patchmanager wanted to structurally strengthen the digital resilience of both the organization's internal network and the product — with regular, in-depth pentests as the foundation.

The Approach

The collaboration began with three black-box penetration tests and, as trust grew, expanded to include gray-box and white-box testing. During the white-box test, Warpnet was granted full access to the architecture, source code, and accounts to identify risks.

The outcome

Each test delivered a clear, risk-based report that allowed Patchmanager to get to work immediately. The collaboration evolved into 24/7 SOC services featuring continuous monitoring, response, and the complete remediation of risks and incidents.

“We are very happy with the collaboration with Warpnet. The team has in-depth expertise and truly looks at how they can help us. They communicate well, are flexible, and always do more than they are supposed to do.”

Jerry SeagerJerry Seager
CTO, Patch Manager

Trusted by 750+ CTOs and CISOs

Marco Vellinga

Spindle

“The team was very helpful and met every deadline. They went above and beyond by expanding the scope of the test to address unexpected issues—even though they were not obligated to do so. A truly reliable and pleasant team to work with.”

Erik Rademaker

Envitron

“Warpnet approached the task very seriously and pulled out all the stops to make the test as realistic as possible. Through observation, they discovered how they could gain alternative access to our premises. In the course of this, they succeeded in placing a listening device on the network..

Jasper Zondervan

New Woelwijck

“Warpnet's pen test provided us with a clear picture of the bottlenecks in our security so that we could improve it further. We immediately fixed the high-risk points in the week that followed. So we know that our residents and staff can live and work safely and that we comply with NEN 7510.”

Noud Huisman

Enshore

“Without Warpnet, we would estimate needing at least two additional employees, and that would only be staff who can determine what needs to be resolved – without even addressing the actual fixing of problems.”

Certifications & Accreditations

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Frequently Asked Questions

Web application pentest FAQs

Is a retest included?

Yes. After your developers have implemented the recommendations, we will perform a retest upon request to confirm that the vulnerabilities have indeed been resolved. This way, the process does not end with a report, but with demonstrable assurance.

How long does a web application pentest take?

An average of three to ten business days, depending on the number of pages, user roles, and integrated APIs. You will receive the report within five business days after the test is completed. During the intake, you will be given a concrete schedule so you know when your team can start working on the findings.

Black box, grey box or white box: what fits us?

In a black box test we know nothing in advance and approach the application as an external attacker. With grey box we are given test accounts and documentation, allowing us to test deeper into authorization and business logic. With white box we also have access to source code and architecture. For most web applications we recommend grey box: the best balance between realism and depth. During the intake we will discuss what fits your goal.

What does a web application pentest by Warpnet cost?

After a no-obligation intake, you will receive a quote, and that is the price you pay. The price depends on the size of the application: the number of pages or endpoints, user roles, and linked APIs. Reporting, explanation, and retesting are included as standard. Below you will find general price indications for a one-time pentest and Pentesting as a Service (continuous pentesting).

One-time pentestVAT: €3,200
Pentesting as a Service: i.e. €1,250 per month

Packages & Pricing

What is tested during a web application pentest?

Including the OWASP Top 10, such as injection, broken access control, cryptographic failures, and security misconfigurations. In addition, login and session management, authorization between user roles, business logic, file uploads, connected APIs, and the configuration of the web server and TLS. Where relevant, we test with multiple roles to detect unauthorized access to other users' data.

What is the difference between a vulnerability scan and a pentest?

A vulnerability scan is automated and broad: it flags known vulnerabilities, but does not know your application. A Warpnet pentest is manual and deep: our specialists validate findings, combine them into realistic attack chains, and also test the business logic of your application. Exactly the risks that scanners miss.