Web application penetration testing is used to test websites and their features by safely simulating a cyber attack. Web app pen testing uses the same techniques that are used by real-world attackers. We will critically assess security vulnerabilities, weaknesses and technical misconfigurations in your web apps and APIs. Regular web app pen testing is the cornerstone of any modern security strategy and is vital for keeping your online presence protected against data breaches and reputation damage.

Dedicated Lead Consultant

Works in partnership with you every step of the way.

Experienced Team

Security specialists with a background in product development. 

Advanced Techniques

Manual automated testing methods leave no weakness uncovered. 

Clear Guidance

Detailed reporting and ongoing support help you achieve complete security. 

Benefits of Web App Penetration Testing

Our CREST-certified penetration testers will carefully analyse all aspects of your web app and API to methodically uncover any security weaknesses. Every test follows industry best practices, such as OWASP, and is designed to protect what matters most to your business. We pride ourselves on the quality of the reports we write to inform you about what was found in the test. These reports include an easy-to-understand executive summary, allowing decision makers to understand the current risk posed by the web application, and also includes a vital technical breakdown to allow your technical team to reproduce the findings,fully understand why each of the issues were raised and most importantly how to remediate them.

What do we do in the Test Report?

Outline all vulnerabilities and poor security controls we exposed.

Uncover web application security flaws including more subtle business logic failings.

Reveal insecure functionality in your application. 

Identify security design issues.

Our Methodology

Web apps are tested in both authenticated and unauthenticated models. This ensures all security risks are discovered and documented.

The authenticated part of the pen tests will analyse the security of your web app from the perspective of an attacker who has breached the external security, phished valid credentials or is one of your customers or staff. This is a more in-depth test and shows the real damage a successful cyber attack could cause and confirms whether the security controls you have in place actually work as intended. We combine this model with an unauthenticated test of the web application to confirm if data and other normally restricted resources can be accessed without logging into the application. Web applications, especially those focussed on the user journeys, tend to rely on APIs to deliver functionality. We will examine all exposed API end points and ensure that anyone bypassing the web application frontend and directly interacting with the API cannot subvert any security controls to gain access to resources they were not entitled to.


We determine your specific requirements before building a tailored proposal.


Our thorough testing simulates the attack methodologies of today’s most advanced hackers.


Our comprehensive reports impart clear, practical advice on how to address any weaknesses.


We offer ongoing support to guide you through the process of securing your applications. 

An essential part of your security strategy

If you’re a web-based business, web application testing is essential. As the capabilities of applications continue to increase, so does the scale of attacks against them.

With web application security comprising of websites and web services such as APIs, the sheer size of the attack surface can seem overwhelming – but it doesn’t have to be.

Speak with our expert team to find out how we can help you keep your business-critical web applications secure.


What is tested during a web application test?

Our standard assessment leverages advanced methodology that we developed in-house and uses a combination of automated and manual testing capabilities. Although the specific scope of each test will be determined by the web applications you use and your unique requirements, every test we carry out is in-line with the OWASP Top 10 framework as a minimum.

We’ll scan for a wide range of vulnerabilities in your web applications, including:

  • Cross-site scripting (XSS) flaws, which can allow attackers to extract data or perform DDoS attacks.
  • SSL/TLS weaknesses, which can compromise sensitive personal information.
  • Insecure deserialization, often leading to remote code execution attacks – one of the most serious attacks possible.
Will my day to day activity be disrupted?

Since our testing is carried out on a replica of your live environment, our assessments won’t have any impact on your day-to-day operations.

Should I have any other tests alongside web application testing?

In order to ensure all of your business-critical applications are working securely, and to avoid being exposed to potentially detrimental fines it’s advisable to have all web applications, mobile applications and software products thoroughly tested for any vulnerabilities.


A data breach in a well known US credit reporting agency in 2017 should have acted as a stark reminder that cyber-attacks can cause significant financial damage to an organisation.

The agency suffered a data breach due to a weakness in one of its web applications which resulted in costs of up to $75 million. This incident also wiped $5.3 billion off its market cap.

As well as the direct costs associated with responding to a breach and securing your systems, indirect costs such as regulatory fines, legal action and reputational damage can all damage your bottom line for years to come.

Most breaches are easily avoidable, and in the case of this agency a web application penetration test could have helped to identify the issues that lead to it being exploited.

Other services

Mobile Application Testing

86% of mobile applications have at least one vulnerability violating the OWASP Top 10. If these issues are exploited by cyber criminals or malicious users, it can have serious implications for an organisation, in terms of both cost and reputational damage.

 Learn more >

Product Assessment

If you develop a software product or service, are you confident that it’s as secure as it can be? Your clients rely on you to keep their data secure, so if you’ve not had your product or service independently assessed, your reputation is at risk if a vulnerability is discovered. 

Learn more >