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Web Application Penetration Testing & Assessment

Secure critical web applications and APIs against the latest cybersecurity threats with Web Application & API Testing from CyberOne.

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Shield your critical web applications from attack with web application testing

Web applications play a crucial role in a business. Holding an extensive collection of sensitive information makes them an attractive target for cyber attacks – and with every new line of code, the chance of a bug appearing increases.

In today’s digital landscape, where cyber threats are becoming increasingly sophisticated, protecting your web applications is paramount. At CyberOne we think differently, adapting our web app testing service to align with your unique business environment.

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CyberOne’s Web Application Testing Services

At CyberOne, we have the experience testing different kinds of web applications and websites including SaaS platforms, ecommerce stores, news websites and social networks. From security to usability, check out our web app testing services below:

Web application functional testing

Our functional web application testing is focused on verifying the system against functional requirements. They include cross-browser testing, acceptance testing, exploratory testing, and more. We simulate user scenarios when writing test cases and executing them.

Web application performance testing

Automating regression, functional, and performance tests allows you to accelerate your release cycles and ensure wider web app testing coverage. We develop custom test automation frameworks and use both keyword and data-driven approaches in automated web app testing.

Web application security testing

Web apps are vulnerable to cyber-attacks. Insecure data storage is the most widespread vulnerability that can be exploited using malware. To identify security loopholes in your application, we perform penetration testing where we simulate a hacking attack.

Compatibility testing

Your web app or website will be used in various environments (from a laptop, on a mobile phone), and in different browsers (Safari, Chrome, Firefox), so you need to make sure it works flawlessly everywhere. We provide web app testing services for compatibility to help you do that.

Automated web testing

If there is anything that can be automated in your mobile app, we can configure it for you. We provide mobile app test automation services for regression, performance, functional, and backend testing to support safe and frequent releases.

Usability testing for web application

Usability is key for any web application. From a user’s perspective, a successful web app is one that is easy to learn, easy to interact with, and requires less time to complete tasks. We use UX experts and real users to make sure your app delivers a positive user experience.

CyberOne’s Web Application Testing Process

Our web app testing process consists of 6-steps:


Scope definition & pre-engagement interactions

Based on your defined goals, we’ll work with you to develop a tailored testing strategy.


Intelligence gathering & threat modelling

In this stage, our experts use the latest groundbreaking techniques to gather as much security information as possible about the web apps and sites in the scope.


Vulnerability analysis

Using the latest tools and sector knowledge, we’ll uncover what’s making your critical assets vulnerable and at risk from attack with penetration testing.



Using a range of custom-made exploits and existing software, our web app testers will test all external and internal-facing systems without disrupting your business.



The web app testing team will determine the value of the compromised targets by trying to elevate privileges and pivot to other systems and networks. All compromised systems will be thoroughly cleaned of any scripts.



Our security team will produce a comprehensive report with their findings. Once received, we’ll invite you for a collaborative read through so we can discuss the key aspects of the web application test for your business.

Key drivers for CyberOne Web App Testing

1. Prevent application breaches

Our web app testing detects and analyse defects to get to their root cause, bolstering your security while reducing rework costs.

2. Improve user experience

We perform manual web app testing and browse your application as a user would, removing bugs to optimise experience.

3. Ensure optimal performance

Any web app needs to be ready for increased traffic load. Our performance testing will verify that your app works in any situation.

4. Automate testing process

Our automation helps you keep up with continuous deployment, speeding up the process and lowering the testing costs.

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Frequently Asked Questions

What is web-based application testing?

Web-based application testing, or web application testing, is the process of assessing and validating the functionality, usability, security, performance, and compatibility of applications that are accessed through web browsers. Web app testing involves evaluating how well the application performs its intended tasks, ensuring a positive user experience, identifying and addressing security vulnerabilities, measuring responsiveness and scalability under different loads, and verifying compatibility across browsers and devices.

Why is web application testing important?

Web application testing ensures that applications function properly by identifying and fixing defects and vulnerabilities. Web app testing helps to provide functionality, usability, security, and performance, leading to a high-quality application that meets user expectations and business requirements.

What types of testing are used for web applications?

  • Functional testing
  • Performance testing
  • Interface testing
  • Usability testing
  • Security testing
  • Compatibility testing
  • Automated web testing
  • Database testing

What vulnerabilities can web application testing uncover?

Web application testing can identify the following vulnerabilities:

  • Injection flaws
  • Authentication weaknesses
  • Poor session management
  • Broken access controls
  • Security misconfigurations
  • Database interaction errors
  • Input validation problems
  • Flaws in application logic
  • Improper Access Controls
  • Stored Cross-Site Scripting (XSS)
  • Outdated Website Libraries/Components
  • Cross-Site Request Forgery
  • SQL Injection
  • Reflected Cross-Site Scripting (XSS)
  • CSV Injection
  • Arbitrary File Upload
  • Server-Side Request Forgery
  • Unrestricted File Upload

What are the common challenges in web application testing?

Some of the common challenges in web application testing include:

  • Ensuring cross-browser compatibility 
  • Handling dynamic content and interactions
  • Addressing scalability and performance issues 
  • Keeping up with rapidly evolving technologies 
  • Mitigating security vulnerabilities
  • Setting up test environments
  • Managing data effectively
  • Accommodating localisation and internationalisation requirements 
  • Providing an accessible platform for all users and devices.

What is the difference between API testing and web application testing?

Both types of testing are important for ensuring the quality and reliability of software systems, with API testing being more focused on the backend functionality and data exchange, while web application testing covers the complete user-facing aspects of the application.