A web application penetration test is a targeted, manual security assessment of a web application with the goal of identifying security-relevant vulnerabilities, misconfigurations, and logical flaws before they can be exploited by attackers.
Unlike automated scans, a web application penetration test is performed methodically and in context by experienced penetration testers. The web application is analyzed from the perspective of a real-world attacker. In addition to classic technical vulnerabilities (e.g., injection attacks or improper access controls), the assessment specifically focuses on authentication, authorization, and business logic issues that automated tools are unable to reliably detect.
The test typically follows recognized standards such as the OWASP Testing Guide and the OWASP Top 10, while going beyond them by taking the specific architecture, functionality, and usage of the application into account. The scope and depth of the test are clearly defined in advance (e.g., black-box, grey-box, or white-box approach).
The result of a web application penetration test is a structured report that clearly describes the identified vulnerabilities, assesses associated risks, and provides concrete, technically actionable recommendations for remediation.
A web application penetration test requires more than experience—it needs the precise use of the right tooling. At binsec GmbH, we combine established open-source utilities, commercial solutions, and our own in-house tools to assess the security of web applications end-to-end.
Information Gathering
dig– DNS queries and initial target infrastructure analysis.- binsec.tools – our in-house utilities:
SubDomainFinder– mapping external attack surface via subdomains.CertWatch– certificate transparency and issuance monitoring.
nmap– port and service discovery with version and script-based analysis.
Detection & Documentation
gowitnessandeyewitness– automated screenshots and inventory of discovered hosts and endpoints.wappalyzerand binsec.toolsWebCompScan– detection of frameworks, libraries, and CMS components.
Web Application Testing
curl– targeted requests and reproducible minimal test cases.- Burp Suite Professional – our primary testing platform with extensions like
Autorize,Upload Scanner, and customPythonscripts. ffuf– fuzzing of paths, parameters, and hidden endpoints.nikto– classic vulnerability scanner as a complementary check.
API Testing
- Postman and Bruno – structured collections and reproducible API workflows.
jwt_tool– analysis and manipulation of JSON Web Tokens.sqlmapandsstimap– automated testing for SQL and SSTI injection vulnerabilities.
Cryptography & Transport
- binsec.tools
SSLCheck(plus the standalone CLIsslcheck) – in-depth TLS configuration review. - binsec.tools
HTTPHeaderCheck– analysis of security-relevant HTTP headers.
Scripting & Automation
Python– tailor-made scripts, proofs of concept, and automation for specific test cases.
Conclusion
A successful web application pentest does not rely on a single tool but on the coordinated combination of multiple approaches. This ensures realistic coverage of all relevant attack vectors—from infrastructure and APIs to application-specific logic.
Penetration Testing
FAQ
Our FAQ provides clear answers to common questions – straight from pentesting experts and completely ad-free.
What is a penetration test? What types of penetration tests are there? What is the difference between a vulnerability scan and a penetration test?
How often should a penetration test be conducted? What data protection regulations are necessary for a penetration test?
How to become a Penetration Tester? Should I Learn Kali Linux to Become a Penetration Tester?
Which Tools Does binsec GmbH Use in a Web Application Penetration Test?
What is Red Teaming? How do Red Teaming and penetration testing differ? Who is Red Teaming intended for?
Manual Penetration Testing by Certified, In-House Senior Penetration Testers
Who tests
For more than ten years, binsec has stood for technically rigorous, strictly manual penetration testing. All engagements are conducted exclusively by employed senior penetration testers. Freelancers or subcontractors are not involved. Our clients work directly with the responsible senior tester who personally performs and technically leads the assessment. Communication is conducted in German and English; international projects are a regular part of our work. Our experts hold recognized offensive security certifications such as OSCP, OSCE, CRTO, and BACPP.
What we test
Our project experience covers complex enterprise networks, modern web and API architectures, and hybrid infrastructures. We work with organizations in manufacturing and industry, financial services and insurance, healthcare, IT and software providers, as well as public institutions. Technical, regulatory, and organizational requirements are systematically taken into account.
How we work
Our tests are based on a structured and reproducible methodology. They align with established standards such as OWASP and OSSTMM and are adapted to the specific project scope. Each assessment follows clearly defined phases: structured reconnaissance, manual analysis, targeted exploitation, and validated impact assessment. Automated tools support the process; identification, verification, and evaluation of vulnerabilities are performed manually.
Where we operate and document
Assessments are not conducted from cloud infrastructures. We operate our own infrastructure in a data center in Frankfurt. From there, all engagements are centrally executed and documented within our internal system PTDoc. PTDoc serves as the central documentation platform for all project data, evidence, and evaluations. All findings are recorded in a structured manner, technically described, risk-assessed, and supported by reproducible proof-of-concept information.
What you receive
We identify technical vulnerabilities and assess their business impact. Findings are evaluated based on risk or CVSS. The result is a clearly structured report including an executive management summary and detailed technical documentation. Re-testing of identified vulnerabilities is an integral part of our service.
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