Web application penetration testing Services
Web applications and APIs with undetected authentication flaws, injection vulnerabilities, and business logic weaknesses expose businesses to data breaches, financial penalties, and reputational damage.
Cyphere’s web application penetration testing services deliver manual-led assessments covering OWASP Top 10 vulnerabilities, authentication bypass, and injection flaws. Certified testers provide actionable remediation guidance, reducing your web attack surface across applications and APIs.
Get in touch
Why is Web App Pentesting Important?
Modern technologies power revenue streams and customer interactions, from online stores and financial payment gateways to customer portals and SaaS platforms. Secure coding practices are the foundation upon which this growth is built. However, even with the most diligent secure development lifecycle, vulnerabilities in web applications are an ever-present risk.
Proactive Web Application Penetration Testing is therefore not just a technical best practice – it is a fundamental requirement for maintaining customer trust and ensuring business continuity. For organisations that rely on web applications to deliver services and process sensitive data, web app pen testing is mission-critical because:
- Erosion of Customer Trust: Security incidents such as disclosures or data breaches directly break customer confidence, leading to loss of business and reputational damage.
- Vulnerabilities in Complex Web Applications: Modern web applications are inherently complex, often built with numerous integrations, APIs, and third-party components. This complexity inevitably introduces changes that must be validated for any potential web app and underlying API vulnerabilities.
- Evolving Web Application Attack Vectors: The threat landscape for web applications is constantly changing, with new attack vectors emerging regularly, specifically targeting web-based vulnerabilities like broken access controls, authentication, authorisation, XSS, SQL Injection or specific exploits.
- Compliance Mandates for Web Applications: Regulations like PCI DSS (for online payments), GDPR (for data privacy in web applications), and others directly mandate security testing for web applications that handle sensitive customer and financial data.
- Beyond Automated Web Scans – Expert Web App Pen Testing: Automated web vulnerability scanners are a starting point, but they cannot replicate the subtle logic and sophisticated techniques of a skilled web app penetration tester who can identify complex vulnerabilities in real-world web applications.
Cyphere’s CREST accredited web app penetration testing services are specifically designed to address these critical web application security challenges. We provide in-depth assessments that go beyond surface-level scans, ensuring your web applications, APIs, and online platforms are robustly secured, protecting your growth and, above all, your customer trust.
Cloud or on-premises, securing your code is your responsibility
Industries we serve
- BFSI – Fintech, insurance, banking
- Healthcare and NHS Trusts
- E-commerce and Online Retail
- Technology and Software
- Government and Public Sector
- Education and Research
- Manufacturing and Industrial
- Professional Services
Benefits of Application Pentesting Services
Assess your entry points and application security controls against real world scenarios
Validate secure design best practices, known security standards such as OWASP Top 10.
Timely check to avoid common pitfalls during secure software development lifecycle
Ensure strong authentication, authorisation, encryption mechanisms
Find loopholes to avoid data leakage or theft
PCI DSS, ISO 27001, Compliance Support
Web App Pen Test Services: Types of Testing We Offer
Web application penetration Testing
A web application security testing forms the basis of any business trading on the Internet securely. Without security in mind, applications are a treat for online fraudsters to target genuine unsuspecting users.
Secure Code Review
Secure Code review is the process of manually reviewing the source code that would highlight issues missed during a black box pentest. This review helps to detect the inconsistencies during all other web app pen tests.
Thick client application pentesting
Thick or compiled applications are popular in an enterprise for their internal operations. Legacy thick client applications could have inherent problems waiting to be discovered or rather exploited.
Database security review
Data breaches are directly related to extracting data from cloud. Validation of security controls around data storage through website penetration testing helps protect the data which includes both cloud & other DB.
See what people are saying about us
Excellent people to work with.
"Very good knowledge of requirement and give us correct findings with excellent remedy to improve our security for our B2B portal site."
Harman was great, really knowledgeable
"Harman was great, really knowledgeable, helpful and on hand to answer any questions. The final report was very clear providing all the technical information."
My experience of the team was 5 star.
"They were so helpful, and their technical delivery and client communication were excellent."
Extremely satisfied
"Extremely satisfied with their approach, speed and end results that I got for my company. Big Thanks."
Experienced Team
"Great experienced team, very knowledgable and helpful, willing to adjust the product to suit the customer. Would recommend."
Professional Work
"A totally professional engagement from start to finish with the highest quality advice and guidance."
High Quality Testing Service
"The service provided by Cyphere is second to none. High quality testing services. Very reliable and professional approach."
Assured Service
"Cyphere provide a personal and assured service, focusing on both pre and post analysis in supporting us to change and embed a security cultured approach."
Recommended Service
"Highly recommend Cyphere for pen testing. The recommendations in the report were comprehensive and communicated so that technical and non-technical members of the team could follow them."
Recommended Pen Testing Service
"Cyphere were great in both carrying out our penetration testing and taking us through the results and remediation steps. We would gladly use them for future projects.
Highly Recommended
"We had penetration tests service for PCI DSS compliance program from the Cyphere! Very professional, efficient communication, great findings that improved our system security posture! Highly recommended!
Exceeded Expectations
"Harman and the team at Cyphere truly are experts in their field and provide an outstanding service! Always going above and beyond to exceed customer expectations.
Skilled Team
I’ve worked with Cyphere on a number of penetration tests in addition to some cyber essentials support and certification! I’ve found them to be highly skilled and professional.
Skilled Team
I’ve worked with Cyphere on a number of penetration tests in addition to some cyber essentials support and certification! I’ve found them to be highly skilled and professional.
Perceptive Reporting
Cyphere undertook pen testing for us recently. The process was very smooth, and the team were flexible in working around our constraints. The report was clear, actionable and perceptive.
Outstanding Cybersecurity Partner
Cyphere has been outstanding partner to our agency. I've tried many in the past but they have been extremely meticulous in getting our systems secured.
Helpful Services
Cyphere has been an excellent partner and helped us achieve our goals with a great level of expertise, communication and helpfulness making the whole process easy to understand and complete.
High Standards
Harman and his team were excellent throughout, they understood and completed the tasks (external penetration test) within tight deadlines to a high standard.
Communicative & Responsive Team
I had an amazing experience working with Cyphere! Their communication was top-notch, making the entire process smooth and efficient. I found their team to be incredibly responsive and attentive to my needs.
Efficient Service
Worked with team at Cyphere for a cyber security assessment, gap analysis etc. The team has delivered a very professional, efficient service at all stages of the process to date.
Why Choose Cyphere as Your Web App Pen Test Company?
Business-Focused Testing: Our approach aligns with your specific business context, industry regulations, and risk profile, ensuring that security findings are relevant and prioritised according to your organisation’s needs.
Continuous Partnership: We don’t just report and run once testing is done. Our service includes debriefing calls with the technical and functional audiences, unlimited retesting, risk remediation guidance and ongoing support. We’re invested in your long-term security success.
Comprehensive Methodology: We employ a proven methodology that includes manual testing techniques, ensuring a thorough assessment of your security posture. We follow industry best practices and standards (e.g., OWASP Testing Guide, NIST) and look out for cyber security risks such as application logic and business logic flaws.
Focus on Real-World Scenarios: Our testing simulates real-world attack scenarios, including common attack vectors and advanced persistent threats or tactics, to identify vulnerabilities that could be exploited by threat actors.
Clear Communication: We translate complex technical findings into clear, concise business impact reports, helping stakeholders at all levels understand and prioritise security investments. We focus on actionable insights, not just technical jargon.
Buy web app pen test with assured after-care support
Common Web Application Vulnerabilities Identified in Our Web App Pen Tests
Secure hardening vulnerabilities such as OS or web server software patching, information disclosures, directory listing, TLS/SSL encryption weaknesses and network footprint are most common in web apps security testing.
User input submitted to the application is thoroughly tested in a web app penetration test to identify any opportunities for malicious input. Common vulnerabilities such as Cross-Site Scripting (XSS), HTML, JS, SQL Injection, XXE, Cross site request forgery (CSRF), server side request forgery (SSRF) fall under this category.
Data breach vulnerability in cloud pentesting is becoming an increasingly important issue as more businesses rely on cloud-based services. There are a number of ways in which we find data breach vulnerability in cloud pentesting, but one of the most effective is to identify data sets that are potentially vulnerable to attack. While data breach vulnerability in cloud pentesting is a serious issue, it is important to remember that reputable cloud penetration test services can be used to effectively mitigate these risks.
Whether it is possible to access unauthorised functionality and/or data, such as viewing, modifying other user accounts or changing access rights. It may include specific issues to be considered during internal pen testing to discover the most vulnerable route for inside attackers.
We check against the configuration and use of encryption methods used for data at rest and transit. This ensures data is safe against tampering and eavesdropping web application attacks.
Authentication vulnerabilities are one of the most critical and important attack vectors. This area includes multiple website penetration test cases i.e. transmission channels, nature of input, insecure configurations, weak credentials & bypass attempts.
Whether application enforces strict password controls via user account policies and backend password storage in the database. Database storage mechanisms are reviewed to assess encryption algorithms in use.
Session management is the bedrock of authentication domain when it comes to applications. This includes checking for session state, predictability, token tampering, manipulation, session hijacking tests.
Cloud or on-premises, securing your code is your responsibility
The Cyphere Advantage: Secure Your Code with our application pentesting services
Confidence in Expertise: You gain access to a team of highly skilled and certified penetration testers dedicated to not just producing reports but helping you mitigate issues.
Cost-Effective Security: You benefit from flexible pricing models that make high-quality penetration testing accessible to your business without compromising.
Stringent Quality Assurance – Delivering Reliable Results: Quality is paramount in everything we do. Our rigorous quality assurance process includes peer reviews, report validation, removal of false positives and adherence to industry best practices.
Accurate and Actionable Results: You get clear, concise reports with prioritized recommendations that you can immediately implement.
A Trusted Security Partner: You work with a company that values ethical practices, transparency, and building long-term relationships.
Frequently Asked Questions about our Web App Penetration Testing Services
Our web application penetration testing service consists of a technical exercise aimed at simulating an internet-based threat actor or an insider to identify application security vulnerabilities and security issues such as misconfiguration, lack of hardening measures in the web applications. For an extensive read on the topic, read our informational guide on what is web application pen testing?
Based on the functionality and requirements such as drivers, objectives for the business, web application penetration testing offerings include website pen tests, API web app security testing, source code review, vulnerability assessments, threat modelling, database security to a multi-tiered assessment involving the entire tech stack. Specific threat scenarios around data theft or utilising social engineering attacks around malicious employee attacks directly relate to the testing cases such as privilege escalation, authenticated user testing.
We also provide independent end to end security services such as cloud penetration testing, vulnerability assessments, network infrastructure and bespoke penetration testing projects.
The web application pentesting services in UK cost anywhere between £3500 and £15000. This large range includes small web application pentests such as WordPress website to a multi-tiered investment banking product. This is scoped based on the input points within a website, the amount of integrations and modules based on functionalities involved, authentication and authorisation mechanisms, various roles of apn users and business objectives.
Our testing methodology involves checks included in OWASP Top 10, OWASP API Security Top 10, SANS Top 20 Critical Controls and CIS, NIST 800-115. Any specific requirements should be discussed during scoping exercise to reflect this in the deliverables.
Communication plays an important role during security assessments. We always prompt customers to inform us about fragile components during project initiation meetings. Low level attacks, Denial of Service attacks are explicitly deemed out of scope for all assessments.
A custom written report is prepared based on the findings after complete web application penetration testing. This report serves both technical and non-technical audiences with specific sections dedicated to strategic and tactical recommendations, raw/supplemental data, proof of concepts and risk details such as impact, likelihood and risk scorings.
This is followed by mitigation advice along with related references to help customer teams with remediation.
What Makes Cyphere's Web App Pen Testing Different?
As a web app pen test provider, Cyphere advises your business to ensure developers follow secure coding practices and avoid potential application security issues. We then provide remediation advice on mitigating these application security risks and strengthening your defences against future app sec attacks.
- CREST Accredited Web App Pen Testing Company: Partner with a well-known, UK-based CREST-accredited company. Our pen testers have a proven track record with top UK firms and are known for delivering clear, actionable reports.
- Offensive Security Mindset: Our pen testers are deeply skilled in attack tactics and techniques, staying ahead of cyber threats to identify and exploit vulnerabilities effectively, ensuring robust security assessments.
- Comprehensive Threat Analysis & Remediation Advice: Benefit from in-depth threat analysis and reliable, practical remediation advice tailored to your needs, helping you effectively secure your web applications against diverse threats.
- Full Post-Test Care Plan with Free Retests: Receive industry-leading post-test support, including a customized care plan and free retests within 12 months to ensure vulnerabilities are fully addressed and risks are minimized.
- Certified & Accredited Pentesting Security Services: Gain confidence from our team’s extensive certifications (CREST, OSCP, TCM, OSCE, SANS, CEH, CISSP & more) and 10+ years of industry experience, guaranteeing expert, tailored security solutions.
- High Customer Satisfaction: Choose a web app pen test company with industry-leading customer satisfaction rates, reflecting our commitment to quality, up-to-date techniques, and comprehensive client protection.
