Launching a new application is an important milestone for any business. Whether it is a customer-facing web platform, mobile app, SaaS product, or internal business application, launch day is not the end of the security process.
Applications can contain vulnerabilities that were not discovered during development. New configurations, integrations, APIs, user roles, and production infrastructure can also introduce risks once an application becomes available to real users.
For this reason, companies should perform security testing after launching a new application to identify weaknesses before attackers discover them.
Start With a Vulnerability Assessment
One of the first steps after launch should be establishing visibility into the application's security posture.
A vulnerability assessment can help identify known vulnerabilities, outdated components, insecure configurations, exposed services, and other potential weaknesses.
This provides a useful starting point for determining which issues require further investigation.
A vulnerability assessment is not the same as a penetration test. Scanning can identify potential weaknesses, but businesses may need additional testing to determine whether those weaknesses can actually be exploited and what impact they could have.
Test the Web Application
For applications accessed through a browser, web application security testing should be a priority.
Web application penetration testing can examine areas such as authentication, authorization, session management, input validation, access controls, file handling, and business logic.
Testing should also consider whether users can access functions or information they should not have access to.
For example, an application may appear secure during normal use but contain an authorization flaw that allows one user to access another user's records. These issues may require manual testing and an understanding of how the application's functionality works.
Test the Mobile Application
If the new product includes an Android or iOS application, mobile security should be tested separately.
Mobile application penetration testing can examine how the application handles authentication, sensitive data, API communication, local storage, sessions, and authorization.
Mobile applications also depend heavily on backend APIs. Testing the mobile application therefore should not be limited to the application installed on a device. The communication between the mobile client and backend services should also be evaluated.
Test APIs and Application Integrations
Modern applications rarely operate independently. They often connect to payment providers, authentication platforms, databases, third-party services, internal systems, and APIs.
These integrations can create additional attack paths.
Companies should verify that APIs properly enforce authentication and authorization, validate input, limit access to sensitive data, and handle unexpected requests securely.
Testing should also consider whether an attacker can abuse the interaction between different components to bypass security controls.
Review Authentication and Access Controls
Authentication and authorization deserve particular attention after an application launch.
Companies should test whether users can:
Access accounts they do not own
Bypass authentication controls
Access administrative functionality
Change another user's information
Access restricted API endpoints
Escalate their privileges
Continue using sessions after logout or credential changes
Access control problems can be particularly serious because an application may appear secure while its underlying authorization model contains weaknesses.
Testing different user roles and permission levels can help identify these problems before they are exploited.
Look for Business Logic Vulnerabilities
Not every vulnerability is caused by insecure code or outdated software.
Some security issues result from the way an application is designed to operate. These are commonly referred to as business logic vulnerabilities.
For example, an application might allow users to manipulate prices, bypass transaction steps, reuse promotional benefits, or perform actions in an unintended sequence.
Automated scanners may not understand whether a particular business process makes sense. Manual penetration testing can help identify weaknesses that depend on application functionality and expected user behavior.
A penetration test can therefore provide a deeper assessment of how the application behaves under realistic attack scenarios.
Check the Production Environment
Launching an application can introduce configuration differences between development, staging, and production environments.
Companies should verify that production systems do not expose unnecessary services, debugging features, administrative interfaces, credentials, or sensitive information.
Cloud infrastructure should also be reviewed where applicable. Storage permissions, identity and access controls, network exposure, security groups, and other configurations can affect the application's overall security.
Testing the application without considering its production environment can leave important weaknesses undiscovered.
Retest After Fixing Vulnerabilities
Finding vulnerabilities is only one part of the process. Companies also need to verify that identified issues have been properly resolved.
After developers fix vulnerabilities, security teams should retest the affected functionality.
Retesting can confirm whether the original vulnerability has been addressed and whether the fix introduced a new problem elsewhere in the application.
This creates a practical cycle:
Test → Identify → Fix → Retest → Monitor
This process becomes increasingly important as applications continue to receive updates.
Consider Continuous Testing
A new application can change significantly after launch. Developers may release new features, modify APIs, change infrastructure, or integrate additional services.
A security test performed immediately after launch may therefore become outdated as the application evolves.
Continuous penetration testing can help organizations maintain ongoing visibility into application security as systems change.
Continuous testing can be particularly useful for businesses that release updates frequently or operate applications that handle sensitive customer and financial information.
How Often Should a New Application Be Tested?
There is no universal testing schedule for every application. Testing frequency should depend on factors such as application complexity, sensitivity of the data, exposure to the internet, regulatory requirements, and how frequently changes are introduced.
Organizations can use this guide on how often businesses should perform penetration testing to consider factors that influence an appropriate testing schedule.
Additional testing may be appropriate after major feature releases, significant architectural changes, new integrations, authentication changes, or security incidents.
Consider the Cost of Application Security Testing
Security testing costs vary depending on the scope and complexity of an application.
Factors can include the number of applications and endpoints, testing depth, authentication requirements, API coverage, mobile platforms, infrastructure size, and the type of assessment required.
Businesses can review penetration testing costs to better understand the factors that influence pricing.
Smaller organizations can also build security testing into their overall cybersecurity budget based on their risk profile and most important systems.
Choose an Appropriate Testing Provider
The quality of the assessment depends heavily on the testing approach and expertise of the security provider.
Companies should look for providers with relevant application security experience, clear testing methodologies, detailed reporting, and a process for validating remediation.
This guide on how to choose a penetration testing company covers several factors businesses can consider when evaluating potential providers.
Conclusion
Launching an application should trigger a security testing process, not end one.
Businesses should assess vulnerabilities, test web or mobile applications, review APIs and access controls, examine business logic, evaluate production configurations, and retest vulnerabilities after remediation.
As applications evolve, security testing should evolve with them. Combining vulnerability assessments, penetration testing, continuous testing, and regular retesting can help businesses identify security weaknesses before they become opportunities for attackers.
The goal is not simply to find vulnerabilities after launch. It is to establish a security process that continues as the application, infrastructure, and business requirements change.
