Application Security

WorkNest Secure

From web and mobile apps to APIs and desktop software, our application security testing services uncover vulnerabilities before attackers do.

We use industry-leading methodologies like OWASP and real-world attack simulations to provide clear risk ratings, actionable remediation guidance, and support for secure SDLC integration, helping you build and maintain resilient applications.

Web Application Penetration Test

Our web application penetration testing is a proactive security assessment that identifies and exploits vulnerabilities in web applications, APIs, and backend systems.

We simulate real-world attacks to reveal flaws that could cause data breaches, unauthorised access, and business disruptions.

It evaluates your authentication, session management, input validation, and overall security controls to ensure your applications can withstand cyber threats.

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Input validation - Prevents SQL injection, Cross-Site Scripting (XSS) and Cross-Site Request Forgery (CSRF).
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Secure file upload - Checks the security of file upload functionalities to prevent malicious uploads and execution.
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Encryption & transportation - Ensures data is securely encrypted with strong ciphers and properly implemented.
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Security patching - Ensures all areas of your web applications are up to date with known security vulnerabilities.

Our web application penetration testing is a proactive security assessment that identifies and exploits vulnerabilities in web applications, APIs, and backend systems.

We simulate real-world attacks to reveal flaws that could cause data breaches, unauthorised access, and business disruptions.

It evaluates your authentication, session management, input validation, and overall security controls to ensure your applications can withstand cyber threats.

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Input validation - Prevents SQL injection, Cross-Site Scripting (XSS) and Cross-Site Request Forgery (CSRF).
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Secure file upload - Checks the security of file upload functionalities to prevent malicious uploads and execution.
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Encryption & transportation - Ensures data is securely encrypted with strong ciphers and properly implemented.
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Security patching - Ensures all areas of your web applications are up to date with known security vulnerabilities.

Types of web app penetration testing

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Authenticated

Authenticated (aka white-box testing) pen tests assess your web app’s security from the perspective of an attacker who has breached external defences or phished valid credentials. This deeper test reveals the real damage a successful cyber-attack could cause.

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Unauthenticated

Unauthenticated web app testing, or ‘black box testing’, simulates the damage a cyber-criminal could cause without valid user credentials. It helps identify vulnerabilities that can be exploited by anyone with access to the web app, such as a login page.

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API

API penetration testing is a vital component if your web app uses an application programming interface. It’s best practice to test APIs alongside your web apps, though API testing is often scoped separately from a web app penetration test.

Mobile Application Penetration Test

Our mobile app penetration tests identify and exploit vulnerabilities or misconfigurations in Android, iOS, and cross-platform apps.

They reveal flaws in app architecture, offering actionable insights to build security by design into your SDLC, ensuring compliance, protecting user data, and safeguarding reputation.

Our testing helps secure apps against unauthorised access, data breaches, and evolving threats.

Benefits of mobile app penetration testing

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Identifies & fixes security flaws

Uncovers vulnerabilities such as insecure data storage, input validation issues, and weak authentication.

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Comply with regulations

Meet regulatory requirements for mobile app security, such as GDPR, HIPAA, and industry-specific standards.

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Improves user trust

Demonstrating strong mobile app security reassures users and strengthens your organisation's reputation.

Desktop Application Penetration Test

Our desktop application penetration tests uncover vulnerabilities and misconfigurations in Windows, macOS, and other desktop software.

They expose flaws in application logic, configuration, and implementation, providing actionable insights to embed security into your development lifecycle, ensure compliance, and protect user data and organisational reputation.

Our testing helps defend desktop apps against unauthorised access, data leakage, privilege escalation, and evolving threats.

Our desktop application penetration tests uncover vulnerabilities and misconfigurations in Windows, macOS, and other desktop software.

Our testing helps defend desktop apps against unauthorised access, data leakage, privilege escalation, and evolving threats.

Benefits of desktop app penetration testing

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Protection against damaging breaches

Desktop applications often handle sensitive data. Testing can identify vulnerabilities, reducing the risk of data breaches from ransomware or unauthorised access.

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Comply with regulations

Many industries require secure software practices to meet standards like GDPR, HIPAA, or PCI-DSS. Pen testing helps ensure your desktop apps meet these requirements, reducing legal and financial risk.

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Increased trust

Users expect secure software. Showing that your application has undergone rigorous testing builds confidence among customers and stakeholders.

API Penetration Test

WorkNest Secure's API penetration testing can uncover vulnerabilities in your authentication, authorisation, and data handling.

Our experts use current attack techniques to assess REST, SOAP, and GraphQL APIs for weaknesses, misconfigurations, and business logic flaws.

They can conduct static source code reviews, such as Static Application Security Testing (SAST) and Dynamic Application Security Testing (DAST). DAST simulates attacks on running applications to detect conditional vulnerabilities. Both SAST and DAST are key to securing your software development lifecycle (SDLC).

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Encryption & transportation - Ensures API requests and responses are securely encrypted with strong ciphers and correct implementation.
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Identify authentication & authorisation flaws – Detects weaknesses in API authentication and authorisation mechanisms, such as broken token validation, improper role enforcement, and missing access controls.
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Reveal insecure API logic & excessive data exposure – Uncover flaws that could lead to privilege escalation, bypassing workflows, or exposing sensitive information beyond what is necessary.

Types of API penetration testing

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Authenticated

Authenticated (white-box) API testing evaluates security from the perspective of a compromised or malicious user with valid API credentials. It reveals access-control flaws, privilege-escalation risks, and excessive data exposure.

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Unauthenticated

Unauthenticated (black box) API testing simulates an external attacker targeting exposed API endpoints. It helps identify misconfigurations, broken authentication, and publicly exposed data.

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Integrated

APIs are often the backbone of web and mobile apps, making API security testing vital. While often included in broader web app tests, dedicated API penetration testing offers deeper insights into API-specific threats.

Code Review

We also offer smaller-scale, code-specific assessments to review code and identify security flaws, such as injection risks, insecure logic, and poor handling of sensitive data.

Why Teams Love Us

hether you need a tailored quote, expert advice, or a clear starting point, our specialists are ready to guide you.

“I’ve taken WorkNest into every organisation that I’ve worked with. I’ve introduced them to many teams and many colleagues and referred them with absolute pleasure because I genuinely trust in the service that we get.”

Joanne Beaver

Operations Director, Beaverfit

"We’ve always been very impressed with the cyber security services WorkNest provide us. Their professional approach, knowledge and flexibility have ensured they have become a key trusted partner in our supply chain."

Nick Fryer

Paymentsense - Europe largest merchant service provider, CTO

“We moved our legal support to WorkNest having previously used a time and line law firm. It was important, though, that an all-inclusive fee structure did not come at the expense of quality. Thankfully we’ve been delighted with the service we’ve received from WorkNest"

Chief Executive

Waverley Care

"WorkNest supported us with a detailed application penetration test and forensic analysis on one of our key payment-related systems. Their consultants quickly identified underlying vulnerabilities and provided clear insight into how these issues could be addressed."

IT Manager

Leeds United Football Club