Expert Web Application Penetration Testing for Safer, Stronger Apps
Your web applications are core to how you serve customers, store data, and operate online. But even well-built apps can contain hidden vulnerabilities. With targeted, expert-led web application penetration testing services, Equilibrium helps you uncover and fix the security flaws that real attackers exploit.
What Is Web Application Pen Testing?
Web application penetration testing is a focused security assessment that simulates how an attacker would try to compromise your web application or APIs. It helps identify vulnerabilities in your application’s design, configuration, or code before they can be exploited.
- We don’t rely on automated scans alone — we manually test how your app handles data, processes inputs, and responds to unusual or malicious behaviour.
- The goal is straightforward: identify security flaws that could lead to unauthorised access, data exposure, or service disruption — and give you the clarity to fix them before they’re exploited.
- Whether your application is customer-facing, internal, or API-based, a web app pen test helps confirm it’s secure and ready.
Our team is CREST and OSCP certified, highly skilled and trusted in web application testing, with extensive experience helping businesses secure all types of web applications.
What Application Vulnerabilities Do We Look For?
Our web application penetration testing service is designed to identify real risks in both in-house and third-party applications — before they can be exploited.
We follow a manual, threat-led approach that reflects how real attackers behave. Tests are based on standards like the OWASP Top 10, but tailored to your tech stack, data exposure, and risk profile.
Here are some of the most common vulnerabilities we uncover during our testing of web apps and APIs:
- Injection flaws (e.g. SQL injection, OS command injection)
- Authentication weaknesses, including login bypass and brute-force risks
- Poor session handling, such as session fixation or insecure cookies
- Broken access controls, including privilege escalation
- Database exposure through unprotected queries or misconfigured permissions
- Input validation gaps that enable tampering or unexpected behaviour
Whether we’re web app pentesting a customer portal, internal admin panel, or public API, our goal is to surface the vulnerabilities that matter — not just tick boxes. That’s what makes us a trusted web app pen testing company for teams who need results they can act on.
What Are The Benefits of Web Application Pen Testing?
If your teams rely on web applications to deliver services, manage operations, or support customers, a security failure can cause serious disruption. Web application penetration testing gives you peace of mind that your apps are resilient, secure, and ready to stand up to real-world threats.
Secure the apps you build and depend on
Web application penetration testing helps you identify weak points before they’re exploited — protecting your data, uptime, and reputation.
Support for compliance and audits
A web application security test can help demonstrate due diligence for compliance frameworks such as PCI DSS, ISO 27001, GDPR, and more.
Gain confidence through clear reporting
You’ll receive a prioritised, actionable web app security testing report — designed for both technical teams and stakeholders — to help guide remediation without wasted effort.
Validate your applications under real attack conditions
Our manual web app pentesting process replicates how attackers exploit vulnerabilities — covering APIs, authentication flows, access controls, and more.
How Our Web App Pen Testing Works
Our web application penetration testing is manual-first, focused, and built around how real attackers operate. We tailor every engagement to your goals, your risk profile, and your application architecture.
- 1. Scoping: We work with you to define the right scope — whether you’re testing a customer portal, internal tool, or third-party app. You tell us what matters; we help set realistic boundaries for the web app pen test.
- 2. Authenticated vs. Unauthenticated Testing: We can perform authenticated or unauthenticated testing. While both have value, we usually recommend authenticated testing. Why? Because attackers have unlimited time — we don’t. Authenticated access allows us to cover more ground in the limited test window and uncover deeper application-level vulnerabilities that matter.
- 3. Reconnaissance: We map your application like an attacker would — identifying inputs, exposed components, and potential entry points across APIs, forms, and logic flows.
- 4. Manual + Tool-Assisted Testing: Using a mix of commercial tooling and in-depth manual techniques, we assess your app’s real behaviour — not just its surface. This includes web app security testing across input validation, session handling, authentication, and access control.
- 5. Reporting and Debrief You’ll receive a clear, prioritised report with practical remediation advice — built for both technical and non-technical teams. A debrief with your tester is available to walk through the findings, answer questions, and help plan next steps.
Curious About The Craft Behind App Security Testing?
It’s a blend of art and science. Explore our playbook for the methodologies our experts use in each test.
Hear From Our Customers
We chose to work with Equilibrium because, from our very first meeting, it was clear they were knowledgeable, open, and genuinely cared about protecting their customers. Equilibrium carried out penetration testing on our network and provided a comprehensive report. This proved extremely valuable, as it gave us a clear roadmap with defined actions for our IT partner to follow. Having this type of testing carried out externally was also an important part of ensuring objectivity and thoroughness.
What stood out most was the clarity of information and the team’s clear, straightforward communication throughout the process. Equilibrium has given us greater confidence in our business continuity, and we would absolutely recommend them to others seeking Cyber Security services. They made the entire process simple, and their findings were clearly and effectively communicated.
Ryan Ginty
Managing Director, Auger Torque
Work With Certified Web Application Pentesting Experts
Improve your security posture with real-time web app penetration testing that uncovers security issues and highlights paths attackers could use for gaining access.
We are proud to be CREST accredited for penetration testing and vulnerability scanning. Our security professionals have a wealth of knowledge in web application pen testing, API testing, and website security assessments. We’re here to help your organisation identify and fix exploitable security vulnerabilities, keeping you safe from application threats.
If you need a trusted web app pen test uk, who can speak your language, work with your developers, and provide results that drive action — that’s exactly what we do.
- Pen testing an application involves identifying vulnerabilities in the application's code, allowing developers to address them and improve the overall security.
- Ensure that you properly implement authentication mechanisms and access controls with trusted web application pen testing.
- Web app security testing that tests for common for vulnerabilities, such as cross-site scripting (XSS), SQL injection, or session hijacking.
- Work with a trusted web app penetration testing company, and instil confidence in users by assuring that their personal information is well-protected.
Meet Our Pen Testers
Frequently Asked Questions
Yes — Equilibrium’s app security testing service is built around industry-recognised best practices, including the OWASP Top 10.
We use the OWASP framework as a baseline to identify the most critical security risks in modern web applications.
Web-based application testing seeks to find and fix security risks in a web application. It does this by simulating real-world attacks. We follow an extensive web application penetration testing checklist.
During a pen test, the tester thinks like a hacker and tries to break into the application. This involves checking the security of things like authentication, input validation, and access controls. Finding weaknesses in these areas helps improve the application’s overall security.
Pen testing services are proactive. They find weaknesses before attackers can take advantage of them. This helps organisations fix problems and protect their data and customers.
Pen testing frequency varies based on factors like web application complexity and breach risk. Experts generally recommend annual pen testing or testing after major application changes.
However, new threats and vulnerabilities keep appearing. High-risk organisations or those with sensitive data may need more tests. This ensures their security measures stay effective and current.
Also, consider a web app pentest after significant infrastructure changes, like new technology deployments or third-party system integrations. These changes can introduce new vulnerabilities not covered in previous tests.
A web app pentest should be done by skilled experts. They need to understand web application security and the latest hacking methods. They should follow industry best practices and maintain a strong ethical framework.
Take a look at our credentials for you web app pentesting.
The length of a pen test varies based on the complexity and size of the web application. This is the same with any pen testing services. Typically, it can take from a few days to several weeks for our web based testing software. The pen test website methodology also affects the duration.
A simple web application with few functions will take less time than a complex enterprise system with many parts. More thorough tests, including detailed vulnerability assessments and extensive exploitation attempts, will naturally take longer.
Resource availability, such as the testing team and access to the application, also impacts the timeline. Effective coordination between the testing team and the organisation is essential for a smooth process.
It’s crucial not to rush website pen testing on your pentest website. Cutting corners can lead to missed vulnerabilities and incomplete assessments, reducing the pen test web’s effectiveness.