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Web Application Testing

Gain complete insight into the potential impact of a breach into your organisation’s web applications and application programming interfaces (APIs).

Service Summary

Using a combination of custom tooling, automated tooling and manual testing, our penetration testing team will take a business-focused approach. Beyond identifying common vulnerabilities and misconfigurations, the assessment will help your organisation understand the tangible impact on your business and operations.

  • Identify Common Web Application Vulnerabilities - For example, injection flaws, broken authentication, sensitive data exposure, and XML external entities.
  • A Prioritised List of Potential Risks - Understand which risk and attacks pose the greatest risk to your applications and APIs, and how to address them.
  • Tailored Engagements for Any Goal - None of our assessments are ‘out-of-the-box’; Bridewell collaborates with organisations to develop a framework that assesses specific areas of concern in line with business objectives.
  • Deep Sector Experience - Bridewell have worked with organisations in some of the most highly regulated and critical industries and understand the unique business challenges and risks faced by these sectors.
  • Highly Accredited for Penetration Testing - Bridewell is accredited by CREST, the OSCP, Zeropoint Security CRTOs, are Tiger-certified, and possess Certified Cyber Security Consultancy status with the National Cyber Security Centre (NCSC).
  • A Realistic Simulation of Real-Life Attacks - Bridewell’s assessments are goal-oriented and accurately recreate the tools, tactics and procedures that would be used by a real-world attacker.

Key Challenges

Modern web applications act as a ‘front end’ for most organisations and rely on complex APIs to handle customer data – everything from payments to inventory and customer service.

While a lot of modern application frameworks are secure as standard, they can easily be misconfigured or fall behind the latest updates which leaves room for exploitation by bad actors. 

Moreover, web applications and APIs are frequently interconnected with other services and run in the cloud, meaning that potential compromises can lead to further compromises in other areas of the business.

This complexity leads to heavy scrutiny from ‘bug bounty hunters’ and potential threats, while also making it challenging for organisations to completely secure them. 


Web application and API Testing

Key Benefits

Here are just some of the benefits of trusting Bridewell to provide you with Web Application and API Penetration Testing:

Secure Web Applications and APIs

A comprehensive understanding of vulnerabilities in your applications and how to address them.

A Holistic Understanding of your Applications

Our assessments test users as well as tech to ensure front facing services are secure at all levels.

Achieve Compliance

For industries where penetration testing for web applications is legally required, completing an assessment ensures compliance.

Prioritised Remediations

Our post-assessment reports support remediation with recommendations based on potential impact and ease of implementation.

How it Works

Bridewell can take either an authenticated or unauthenticated approach to testing web applications and APIs.

Typically, our penetration testers will prefer to take an authenticated approach – where the client provides us with relevant permissions and accounts – in order to assess how potential adversaries would exploit web applications once they gain the right credentials. For organisations who prefer it, our team can also take an unauthenticated approach.

Our team uses custom tooling and in-depth manual testing to help find obscure vulnerabilities in addition to the common vulnerabilities identified by our automated tooling.

All our engagements align with the latest OWASP Web Security Testing methodology to ensure consistency and to allow our team more time to spend on finding harder to find vulnerabilities.


Generally, This Includes Testing of the Following:

Why Bridewell?

As one of the UK's largest independent cyber security service providers, we're trusted by some of the most highly regulated organisations to protect their data, reputation and business. With our industry-leading certifications and our customer-centric approach, we're optimally positioned to provide end-to-end cyber security services tailored to your business' individual needs.

Security Specialists


Security Certifications

  • Award-Winning
  • Agile and Responsive Delivery
  • Strategic Insight and Technical Expertise
  • An Extension of Your Team
  • Flexible Commercial Models
  • Trusted by Microsoft
  • 24x7 MDR & Security Operations Centre
  • Dedicated to Cyber Security
  • Cyber Security for the Wider Good
  • Committed to Sustainability
  • Developing Cyber Skills for the Future


Here are some commonly asked questions about Web Application and API Penetration Testing. If you’d like to learn more speak to one of our team. 


Web apps and application programming interfaces (APIs) contain sensitive and personal data that can impact consumers and organisations.  

There are many purposes for web application penetration testing, but the most common is to find and exploit vulnerabilities in web applications in order to gain unauthorised access to sensitive data or to perform other malicious actions. By testing the security of web applications, organisations can ensure that their applications are not susceptible to attack and that their data is safe from unauthorised access.  

Some of the most common web application vulnerabilities include:

1. Injection flaws – these occur when user input is not properly sanitised before being used by the application. This can allow attackers to inject malicious code into the application, which can then be executed by the application.

2. Cross-site scripting (XSS) – this is a type of SQL injection flaw, but specifically refers to when malicious code is injected into a web page. 

Penetration Testing Insights

Ready to Take the Next Step?

We’re here to help, so to speak with our team and learn more about how Bridewell can benefit your organisation, just complete the below form and one of our experts will be in touch.

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