Pentest Web application & Website

In an era where cyberattacks are escalating and data breaches make headlines regularly, website security has become a critical business imperative. Organizations worldwide face sophisticated threats that can compromise sensitive data, disrupt operations, and damage reputation irreparably. A website penetration test (pentest) is your proactive defense strategy to identify and remediate vulnerabilities before malicious actors exploit them.
Website Penetration Testing

Secure Your Web Applications and Data with Confidence

Our website penetration testing service provides in-depth security analysis of your web applications, performed by certified security professionals who understand modern threat landscapes and compliance requirements. Whether you’re a small business, enterprise organization, or e-commerce platform, discover how our systematic approach can protect your digital assets and reinforce stakeholder confidence.

What is Website Penetration Testing and Why is it Essential?

Website penetration testing is a controlled, authorized simulation of a cyberattack conducted by security experts to identify exploitable vulnerabilities in your web application. Unlike automated vulnerability scanners that simply flag potential issues, penetration testing involves comprehensive manual analysis that replicates the tactics, techniques, and procedures (TTPs) used by real-world attackers.
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The Risks of Inadequate Web Security

Without regular security assessments, your website faces tangible threats:

Data Breaches

Customer information, financial records, intellectual property, and confidential business data can be stolen and monetized on underground markets or used for competitive advantage.

Reputation Destruction

A single publicized security incident can erode years of brand building and customer trust. Recovery can take years and cost millions in lost business.

Regulatory Penalties

Non-compliance with regulations like GDPR, NIS2, DORA or PCI-DSS can result in substantial fines, potentially reaching millions of dollars or a percentage of annual revenue.

Financial Impact

Direct costs include incident response, forensic investigation, legal fees, notification expenses, credit monitoring services, and potential class-action settlements.

Operational Disruption

Attacks can render systems unavailable, halt business operations, and require extensive recovery efforts that divert resources from productive activities.

Legal Liability

Organizations face increasing litigation from affected parties following data breaches, with potential for significant settlements and judgments.

Tangible Benefits of Website Penetration Testing

Conducting regular penetration tests enables you to:
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  • Identify vulnerabilities proactively before attackers discover and exploit them
  • Validate security controls to ensure defensive measures function as intended
  • Meet compliance requirements for industry regulations and security frameworks
  • Prioritize remediation efforts based on actual risk to your specific environment
  • Demonstrate due diligence to stakeholders, customers, and regulators
  • Improve security posture through actionable insights and expert recommendations
  • Reduce breach probability by closing security gaps systematically
  • Educate development teams about secure coding practices through real-world findings
Comprehensive Testing Process

Our Website Penetration Testing Methodology

Our penetration testing methodology follows industry-leading frameworks and adapts to your unique requirements:

Planning and Reconnaissance

We collaborate with your team to define the assessment scope, objectives, testing windows, and communication protocols. This includes establishing legal authorization, rules of engagement, and success criteria. We gather information about your web application's architecture, technologies, and business logic.

Threat Modeling and Attack Surface Analysis

We map your application's attack surface, identifying all potential entry points, user roles, data flows, and trust boundaries. This phase includes both passive reconnaissance (OSINT gathering) and active enumeration of your web infrastructure.

Vulnerability Discovery

We employ a combination of automated scanning tools and manual testing techniques to identify security weaknesses. This includes examining authentication mechanisms, session management, input validation, business logic, API security, and configuration issues.

Exploitation and Validation

We carefully attempt to exploit identified vulnerabilities in a controlled manner to confirm their exploitability and assess potential impact. This demonstrates the real-world risk rather than relying on theoretical severity ratings.

Post-Exploitation Assessment

For successfully exploited vulnerabilities, we evaluate the extent of access gained, potential for privilege escalation, lateral movement possibilities, and data exposure. This reveals the full impact of security weaknesses.

Documentation and Reporting

We deliver comprehensive reports tailored to different audiences: executive summaries for business stakeholders, detailed technical findings for security teams, and step-by-step remediation guidance for developers.

Remediation Validation

After you implement fixes, we conduct focused retesting to verify that vulnerabilities have been properly addressed and that remediation hasn't introduced new issues.

Testing Approaches

We tailor our testing methodology to align with your security objectives and organizational maturity:

Black Box Testing

Simulates an external attacker with no prior knowledge of your system. This approach tests your external defenses and reveals what outsiders can discover and exploit. Ideal for evaluating your security from an attacker's perspective.

Grey Box Testing

Conducted with limited internal knowledge, typically user-level credentials. This balanced approach efficiently identifies both external and internal vulnerabilities, representing scenarios like compromised user accounts or malicious insiders.

White Box Testing

Comprehensive assessment with full access to source code, architecture documentation, and system details. This thorough approach maximizes vulnerability discovery and is recommended before major releases or for security-critical applications.

Industry Standards and Frameworks

Our methodology incorporates globally recognized security standards:

OWASP Top 10

We systematically test for the most critical web application security risks identified by the Open Web Application Security Project, including injection flaws, broken authentication, sensitive data exposure, and more.

OWASP Testing Guide

Our testing procedures follow the comprehensive OWASP Web Security Testing Guide methodology.

PTES (Penetration Testing Execution Standard):

We adhere to this structured framework that ensures consistent, thorough testing across all engagements.

NIST SP 800-115

We align with NIST guidelines for technical security testing and assessment.

CWE/SANS Top 25

Coverage of the most dangerous software weaknesses that lead to serious vulnerabilities.

PCI-DSS Requirements:

For payment card environments, we ensure testing meets PCI Security Standards Council requirements.

Our Service Differentiators

Minimal Business Disruption

We design our testing approach to minimize impact on your operations. Testing is carefully coordinated with your team, conducted during approved windows, and executed with appropriate safeguards to prevent service disruption.

Ongoing Support and Guidance

Our engagement doesn't end with report delivery. We provide consultation to help you understand findings, prioritize fixes, and implement effective remediation strategies. We're available to answer questions and provide clarification throughout your remediation process.

Comprehensive Reporting

We provide detailed documentation that goes beyond simple vulnerability lists. Our reports include business impact analysis, risk ratings contextualized to your environment, proof-of-concept demonstrations, and prioritized remediation roadmaps.

Quality Assurance Process

All findings undergo rigorous internal peer review before delivery, ensuring accuracy, clarity, and actionable recommendations.

Experienced Security Professionals

Our team consists of certified penetration testers holding industry-recognized credentials (OSCP, GWAPT, CEH, GPEN) with years of hands-on experience testing diverse web applications across multiple industries.

Who benefits from website Penetration Testing?

Our penetration testing services address the security needs of organizations:

Small and Medium Businesses

You don't need enterprise scale to be an attractive target. Cybercriminals often target smaller organizations perceived as having weaker defenses. Our services scale to your budget while delivering thorough security assessment of your web presence.

Enterprise Organizations

Complex web infrastructures with multiple applications, microservices architectures, and interconnected systems require sophisticated testing approaches. We have experience assessing large-scale environments with distributed architectures and complex security controls.

E-commerce Platforms

Online retailers handle sensitive payment data and customer information, making security paramount. Regular penetration testing helps maintain PCI-DSS compliance, protect customer trust, and prevent costly breaches that could devastate online businesses.

SaaS and Web Application Providers

If your business model relies on delivering software or services via the web, security is fundamental to customer trust and competitive positioning. We help you identify and address vulnerabilities before they impact your customers.

Financial Services

Banks, fintech companies, investment firms, and payment processors face sophisticated threats and strict regulatory requirements. Our testing helps meet compliance obligations while protecting against targeted attacks.

Healthcare Organizations

We help healthcare providers and technology vendors identify vulnerabilities that could lead to GDPR and European Health Data Space (EHDS) violations, including patient data exposure.

Government and Public Sector

Government websites and citizen-facing portals require high security standards to protect sensitive information and maintain public trust. We understand public sector security requirements and compliance frameworks.

Technology Startups

Building security into your product from the beginning is far more cost-effective than retrofitting it later. Our agile approach integrates security testing into your development lifecycle, helping you launch secure products faster.

Energy & Utilities

Increasingly digitized operations and critical infrastructure.Pentests help mitigate risks from web customer portals handling personal data and even sometimes payment gateway.

Frequently Asked Questions about
website Penetration Testing

How much does a website penetration test cost?
Penetration testing costs vary depending on several key factors: the complexity of the application, scope of testing, number of user roles and functionalities, testing methodology (e.g. black-box, grey-box, white-box), and the depth of assessment required. For example, a pentest for a simple to medium complexity web application may start around €1,000 to €9,000, while comprehensive assessments of complex enterprise platforms (whole ERP, large customer portal, large e-commerce website,..) can range from €10,000 to €20,000 or more.
Rather than focusing solely on cost, consider the value and risk mitigation: the investment in a penetration test is typically a fraction of the potential financial and reputational damage caused by a data breach—estimated to exceed €4 million on average according to recent industry studies. For EU companies, this is especially critical given the strict data protection obligations under the General Data Protection Regulation (GDPR) and sector-specific compliance requirements (e.g. NIS2 Directive, EHDS for healthcare).
We recommend requesting a customised quote based on your specific business context, regulatory exposure, and risk profile. During an initial consultation, we’ll assess your needs and provide transparent pricing aligned with your budget, compliance obligations, and security objectives.
Testing duration depends on your application’s size and complexity. A typical engagement for a medium-sized web application ranges from one to three weeks of calendar time, with actual testing effort between 40-120 hours. This includes all phases from planning through final reporting.
Larger, more complex applications or comprehensive white box assessments may require several weeks to months. We provide detailed project timelines during the scoping phase and work within your scheduling constraints to minimize disruption.
Generally, no. Professional penetration testing is designed to minimize operational impact while thoroughly assessing security. We conduct tests in a controlled, methodical manner that avoids actions likely to cause service disruption.
However, for production environments handling critical transactions or sensitive operations, we often recommend testing against staging or development environments that mirror production, or scheduling tests during low-traffic periods. We coordinate all testing activities with your technical team and establish communication channels for immediate notification if any issues arise.
Vulnerability Scanning is an automated process using software tools to identify known vulnerabilities by comparing system configurations and software versions against vulnerability databases. Scanning is relatively fast and inexpensive but produces high false-positive rates and cannot assess complex security issues or business logic flaws.
Penetration Testing combines automated tools with extensive manual testing and security expertise. Testers think like attackers, chain multiple weaknesses together, validate exploitability, and assess actual risk. This approach identifies vulnerabilities that scanners miss, including logic flaws, access control issues, and complex attack chains.
Most effective security programs employ both: regular automated scanning for continuous monitoring, complemented by periodic penetration testing for in-depth validation.
Testing frequency depends on several factors:
  • Annually at minimum: Most compliance frameworks require at least annual penetration testing.
  • After significant changes: Test after major application updates, infrastructure changes, or new feature deployments.
  • Following security incidents: Post-incident testing validates that vulnerabilities have been addressed and no additional exposures exist.
  • Continuous for high-risk applications: Mission-critical or high-value targets may benefit from quarterly testing or continuous security validation.
  • Before major releases: Test new applications or major versions before production deployment.

We typically recommend annual comprehensive testing supplemented by focused assessments after significant changes.

Requirements vary based on testing approach:
  • Black Box Testing: Minimal information needed - typically just the target URL and authorized testing window.
  • Grey Box Testing: User-level credentials for authenticated testing, basic architecture information, and potentially API documentation.
  • White Box Testing: Source code access, architecture diagrams, API documentation, database schemas, and potentially infrastructure access.
We work with you during scoping to determine the optimal approach and required access levels. All access is governed by formal authorization and handled with strict confidentiality.
We demonstrate exploitability to validate risk, but we always operate within defined boundaries established during engagement planning. Our exploitation activities are carefully controlled:
  • We typically create test accounts and use test data to demonstrate issues
  • We limit access to sensitive data and report but don't extract or exfiltrate it
  • We immediately report critical findings that pose imminent risk
  • All activities are logged and documented
  • We establish clear escalation procedures before testing begins
Our goal is demonstrating risk while maintaining professional ethical standards and protecting your business interests.