OWASP WSTG

WSTG penetration testing methodology

Uncover hidden threats in your web applications with WSTG (Web Security Testing Guide) - the most respected standard in the industry.

WSTG, developed by the Open Web Application Security Project (OWASP) community, is the backbone of our penetration tests. It provides a comprehensive and systematic framework that ensures no critical area of your application goes unnoticed.

At Haxoris we do not rely on chance. Our testing based on the OWASP WSTG methodology gives you confidence that the security audit is thorough, repeatable, and focused on real threats that put your data and reputation at risk. Whether you need to meet NIS2 requirements, secure a new release, or simply sleep well at night, we are here for you.

OWASP WSTG methodology illustration for web penetration testing

THEY TRUST US

OWASP WSTG

What is WSTG and why is it critical?

OWASP WSTG (sometimes shortened to wstg owasp) is not just another checklist. It is a living, community-maintained manual for ethical hackers that defines how to systematically identify and verify vulnerabilities in web applications.

The methodology covers all key domains and ensures we look at your application through the eyes of a real attacker.

Testing areas

Key testing areas according to WSTG

WSTG-INFO - Information gathering

We start like an attacker - we map your application, search for hidden files and endpoints (wstg-info-02), and analyze server fingerprinting (wstg-info-04) to uncover the full attack surface.

WSTG-CONF - Configuration and deployment management

We review server settings, security headers (wstg-conf-07), cloud configurations, and error handling (wstg-conf-08).

WSTG-ATHN - Authentication

We thoroughly test login processes, password management, multi-factor authentication (MFA), and account recovery mechanisms.

WSTG-SESS - Session management

We analyze the session token lifecycle, its protection, and resistance to attacks such as session fixation (wstg-sess-02).

WSTG-ATHZ - Authorization

We verify that users can access only what they are allowed to. We look for vulnerabilities such as Insecure Direct Object References (IDOR) and privilege escalation (wstg-athz-01).

WSTG-INPV - Input validation

We hunt for common vulnerabilities such as Cross-Site Scripting (XSS), SQL Injection, Server-Side Request Forgery (SSRF), and deserialization attacks (wstg-inpv-17).

WSTG-CRYP - Cryptography

We assess TLS implementation, key and certificate management, and secure storage of sensitive data such as passwords (wstg-cryp-01).

WSTG-BUSL - Business logic

We find flaws that do not break technical rules but enable abuse of intended functionality - such as price manipulation or bypassing payment flows (wstg-busl-02).

Our process

Our process: How a WSTG-based penetration test works

Our approach is transparent and efficient. We work with you from start to finish to ensure the testing matches your needs and delivers maximum value.

Scope and goals definition

Together we define test scenarios, user roles, and key functionality. We model threats relevant to your application.

Active testing

Our team of certified ethical hackers combines manual techniques with advanced tools (e.g., Burp Suite) and systematically goes through all relevant test cases from the OWASP WSTG checklist.

Exploitation and documentation

We carefully document each finding, including steps to reproduce and proof of impact (Proof of Concept). Everything happens in a secure and controlled environment.

Reporting and consultation

We deliver a clear report with findings categorized by WSTG, risk rating (CVSS), and specific remediation recommendations.

Remediation workshop and retest

We review all findings with your development team, answer questions, and after fixes perform a free retest to confirm effectiveness.

Request a no-obligation consultation

Deliverables

What you receive

Our goal is not just to deliver a list of issues, but to provide actionable outputs that help you improve security in practice.

Executive summary

A clear report for leadership that explains business risks in non-technical language.

Detailed technical report

Complete documentation of findings with CVSS scores, evidence, and clear remediation steps.

Developer export

Findings in CSV/JSON format for easy import into systems such as Jira or Azure DevOps.

One free retest

After fixes, we verify that everything is in order.

Get a sample report

Why choose Haxoris for WSTG testing?

Top experts

Our team includes ethical hackers with certifications such as OSCP, OSWE, and CISSP and more than a decade of experience.

Transparency from A to Z

You always know what we test, how we test, and what we found. We communicate continuously and without unnecessary jargon.

Focus on real impact

We do not produce reports full of false positives. We focus on vulnerabilities that pose real risk to your business.

Partnership approach

We work closely with your developers and provide the support they need for fast and effective remediation.

TESTIMONIALS

What Our Clients Say About Us

Ultima Payments

"The decision to collaborate with Haxoris for the penetration testing of our web application was an excellent choice. Thanks to their professional approach, thorough testing, and outstanding communication, we were able to identify and eliminate multiple vulnerabilities. Their detailed final report provided us with a clear overview of our application's security status and specific recommendations for its protection. I can wholeheartedly recommend Haxoris to any company - their services are of a high professional standard, and the results exceeded our expectations."

Digital Systems

"Professional services, client-oriented approach, we would order again :)"

Amerge

"The team has approached penetration testing professionally and impartially, while keeping an open line with our DevOps, frontend and backend developers to ensure proper isolation of production environments. The level of testing and subject-matter expertise was impressive, even compared to other world-class companies in the industry we've worked with. The depth of vulnerability testing and the findings clearly outlined our strengths and areas for improvement, helping us increase our security standards even further."

Piano

"We chose Haxoris to perform penetration testing of our web applications in accordance with ISO 27001 and PCI DSS standards. Their approach was focused on our business needs, and we also appreciate their client-oriented attitude and flexibility."

Frequently asked questions (FAQ)

01 What exactly is OWASP WSTG?

OWASP WSTG (Web Security Testing Guide) is a globally recognized standard and methodology from the Open Web Application Security Project. It defines how to comprehensively test the security of web applications and APIs.

02 How is WSTG different from OWASP Top 10?

OWASP Top 10 is a list of the ten most critical risks for web applications - it is an awareness document. WSTG is a testing methodology that shows how to systematically find and verify these and many other risks.

03 Is WSTG testing suitable for my company?

Yes. Whether you are a startup, e-commerce platform, or financial institution, the WSTG methodology is flexible and scalable. It helps meet regulatory requirements (NIS2, PCI DSS, ISO 27001) and build trust with your customers.

04 What will I receive as the test output?

You receive an executive summary, a detailed technical report with findings, recommendations, and reproduction steps, and a free retest after fixes. Everything is designed to be immediately usable for your team.

Secure your application before it is too late

Do not wait until an attacker finds a vulnerability. Invest in a professional penetration test based on the WSTG methodology and gain confidence that your digital assets are safe.

Schedule testing