Web application penetration testing

Your web application is a valuable asset that must be protected. A web application penetration test is the best way to identify vulnerabilities before attackers can exploit them, safeguarding customer accounts and sensitive data. Stay ahead of threats and keep your business secure with regular pentests.

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Web application penetration testing with OnSecurity

With OnSecurity, you can ensure your web applications are secure, maintain customer trust, and comply with industry regulations, all while minimising risk to your business.

Gain insight into your vulnerabilities

You'll be able to find out where your web app is most vulnerable, see how attackers could exploit these weaknesses and get clear steps to fix these security issues.

Improve access control

You'll be able to make sure only the right people can access sensitive parts of your app, improve how users log in and maintain their sessions and prevent unauthorised users from gaining higher privileges.

Protect sensitive data

Ensure you spot any weaknesses that could let attackers steal your data , guarantee that your data protection measures are effective and close gaps that could lead to data breaches.

What is web application penetration testing?

Web application penetration testing is a simulated security assessment designed to uncover weaknesses in a business's web applications. Penetration testing helps identify vulnerabilities that could enable attackers to:

  • Gain access to user accounts
  • Compromise application data
  • Cause reputational damage
  • Disrupt web application functionality

Our CREST-accredited testers use a combination of manual techniques and automated tools to thoroughly assess application security, pinpointing vulnerabilities that real-world attackers actively exploit. Web application penetration testers leverage deep expertise in app development to identify and address common risks such as:

  • Injection flaws allowing unauthorised access
  • Authentication weaknesses enabling account takeovers
  • Broken access controls granting improper permissions
  • Security misconfigurations leaving entry points open
  • Database interaction errors exposing sensitive data
  • Input validation problems enabling injection attacks
  • Flaws in application logic that can be exploited

Comprehensive penetration testing is crucial to uncover these vulnerabilities before they are discovered and exploited by malicious actors. Our experienced testers methodically assess the security posture and recommend remediation measures to keep your web applications secure.

Get an Instant Web App Pentest Quote

Want to know how much a web application pentest would cost? Try out our instant quote generator to get started.

Why do you need a web application pentest?

Web applications are a top target for hackers seeking to steal data, disrupt services, or damage your brand. With cyber threats growing more frequent and sophisticated, a web application pentest is crucial. It simulates real-world attacks to find and fix vulnerabilities before they can be exploited, helping you avoid costly breaches and downtime.

Beyond just protection, it demonstrates a commitment to security, builds customer confidence, and ensures compliance with industry regulations. Investing in regular pentests is the smartest way to defend your business, reputation, and bottom line from the ever-present risk of cybercrime.

Web Application Test Dashboard
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Crest-accredited web application pentesting

Why Trust OnSecurity with your web application pentesting? Because we’re CREST-approved, adhering to the highest industry standards. Our CREST certification isn't just a badge—it's your assurance of top-tier security:

  • Our methodologies, processes, and procedures undergo rigorous external vetting.
  • Our pentesters are CREST-certified, having demonstrated their expertise through stringent assessments.
  • We employ a best-in-class, manual-first approach to uncover vulnerabilities that others might miss.

Choose OnSecurity for unmatched excellence and thorough protection for your web applications.

Web application security challenges

Web app security presents critical challenges for businesses, and staying ahead of these threats is essential. Here's what you should be concerned about:

Data breaches

Web applications are prime targets for attackers. Breaches can lead to substantial fines and severe reputational damage, impacting your organisation’s trust and financial stability.

Insecure code practices

Poor coding practices, such as inadequate input validation and improper handling of user data, can lead to serious security vulnerabilities.

Lack of expertise

Many businesses face security challenges due to insufficient knowledge or expertise in web application security. Proper web application security testing and expertise are key to confidently navigating these risks and safeguarding your business.

Quick, high-quality pentests

Discover why our user-friendly platform and AI + human approach make pentesting hassle- free.

  • Flexible subscription plans
    Simplify your testing and monitoring with a single monthly payment, combining regular penetration tests and continuous vulnerability scanning. Get predictable costs while receiving ongoing protection.
  • Instant quote & customised plans
    Receive a real-time, personalised cost estimate through our intuitive platform. Tailor your testing needs with configurable options that suit your business goals and security requirements.
  • Effortless platform access
    No more long scoping processes. Book tests directly through our platform or get personalised assistance from our sales team. Enjoy streamlined communication and automated workflow notifications for maximum efficiency.
  • Continuous, real-time testing
    Stay informed with real-time progress notifications and direct communication with testers via in-platform comments. Benefit from ongoing vulnerability assessments to proactively detect and address risks.
  • Immediate, actionable reports
    Access your findings instantly through our platform. Generate detailed reports at any time, offering both technical insights and high-level summaries—without the wait.
  • Free retests for resolved issues
    Once you’ve addressed vulnerabilities, we’ll retest them for free within a flexible window, ensuring your systems remain secure at no additional cost.
  • Ongoing protection & threat intelligence
    Sign up for continuous monitoring to access automated vulnerability scanning, along with situational awareness through threat intelligence, ensuring your defences stay up to date year-round.
Pentesting with OnSecurity process

Other types of penetration testing

Find the penetration test to best suit your business and cybersecurity needs.

Web Application

Uncover and fix critical vulnerabilities in your website before hackers do. Our experts simulate real-world attacks to identify weaknesses in your web applications.

Mobile Application

Secure your iOS and Android apps against potential breaches and data theft. We rigorously test your mobile applications to ensure they're safe for users and your business.

Cloud security

Expose and plug security holes in your cloud infrastructure to prevent data leaks. Our Cloud pentests assess your entire cloud environment for potential vulnerabilities.

Frequently Asked Questions

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What is the difference between web app testing and network penetration testing?


Is web app testing right for your business?

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