What to Test Before Your App Goes Live: A Guide to Healthcare Application Security Testing

Introduction

A healthcare application can pass functional QA and user acceptance testing and still have security weaknesses that should prevent it from going live.

This is because the purpose of functional testing is to find out whether the application functions properly. Meanwhile, healthcare application security testing is concerned with determining whether it is still secure whenever an attempt is made to gain access to something that one is not supposed to access, abuse the permissions granted, tamper with the process or exploit any weaknesses in the surrounding systems.

For healthcare organizations, however, there is more at stake here. Any security vulnerability may put patient confidentiality at risk. Besides, any HIPAA Security Rule-compliant application that deals with ePHI must have safeguards and risk analyses in place. Under the GDPR law, health data is considered a special category of personal data.

So before production approval, healthcare application security testing should focus on the risks that could actually affect the application, its users, and the business.

The Key Security Areas to Review Before Launch

1. Test Whether Users Can Access More Than They Should

A healthcare application should enforce access based on the user's identity, role, and relationship with the data. This is one of the areas where healthcare application security testing needs to go beyond checking whether users can successfully log in.

What to test:

• Patient-to-patient access: Can one patient retrieve another patient's records?
• Role-based access: Can a clinician, administrator, or support user access functionality outside their role?
• API authorization: Can changing an object or patient identifier expose another user's information?
• Session security: Does access end properly after logout, token expiration, or account revocation?
• Privilege escalation: Can a lower-privileged user reach administrative or restricted functions?
• Account recovery: Can password-reset or recovery mechanisms be abused to regain unauthorized access?

Broken Access Control is one of the web application security risks according to the OWASP Top 10 list, making access control testing very crucial when dealing with sensitive health information applications.

Release concern: Unauthorized access to patient information or critical functionality should receive immediate review before production.

2. Follow Patient Data Beyond the Screen

A healthcare application does not stop handling sensitive information when it disappears from the interface. Patient data can move through APIs, device storage, logs, crash reports, analytics platforms, notifications, caches, and backups.

What to test:

• API responses: Is the application receiving more patient information than it actually needs?
• Device storage: Are sensitive records, tokens, or identifiers stored securely?
• Logs: Can sensitive patient information appear in application or server logs?
• Notifications: Could a locked device display sensitive health information?
• Crash and analytics tools: Can third-party services receive information they do not need?
• Backups and caches: Can sensitive information remain accessible after it should have been removed?

For healthcare organizations, this is also where regulatory requirements become practical. HIPAA requires organizations to assess risks to the confidentiality, integrity, and availability of ePHI, while GDPR gives health data additional protection.

The objective is simple: know where sensitive information exists, who can access it, and whether every location is necessary.

3. Test APIs, EHRs, FHIR, HL7, and Third-Party Integrations

Healthcare applications do not function in isolation. Such apps could have links to EHR/EMR systems, FHIR/HL7 APIs, cloud platforms, identity providers, analytics solutions, and third-party libraries.

In light of the above, API security is critical for healthcare application security testing. Among other things, OWASP API Security Top 10 discusses the problem of Broken Object Level Authorization, Broken Function Level Authorization, security misconfiguration, and improper API usage.

What to test:

• API permissions: Does every API enforce the correct user and resource permissions?
• EHR/EMR access: Can users retrieve information outside their authorized scope?
• FHIR and HL7 integrations: Are healthcare resources and workflows restricted appropriately?
• Third-party services: What information can external SDKs collect or transmit?
• Integration failures: Does a failed or misconfigured connection expose sensitive information?
• Dependency risk: Are third-party libraries maintained and free from known critical vulnerabilities?

The main issue: Is it guaranteed that all connected systems get exactly what they need in terms of access and information, and not more?

4. Test What Happens When the Environment Is Not Perfect

It is important to remember that the application does not always have to work under perfect conditions. Mobile applications can be used in lost, stolen, jailbroken, modified, or compromised environments.

That's when mobile app security testing comes into play.

What to test:

• After logout: Does sensitive information remain accessible on the device?
• Compromised devices: What can be exposed if the device itself is no longer trusted?
• Application tampering: Can modifying the application bypass important security controls?
• Screenshots and clipboard: Can sensitive information be captured or retained unnecessarily?
• Local storage: Can someone with access to the device retrieve protected information?
• Sensitive actions: Are stronger checks required before high-risk operations?

The objective is to understand how the application's security behaves when the environment around it cannot be fully trusted.

5. Turn Security Findings Into a Release Decision

A security assessment can produce a long list of findings, but a vulnerability count alone does not tell leadership whether the application is ready for production.

This is where healthcare application security testing needs to connect technical findings with business risk.

A critical vulnerability that enables unauthorized access to patient information should not be treated the same way as a low-impact configuration issue.

A practical remediation approach is:

• Critical: Block the release until the issue is fixed and successfully retested.
• High: Fix before launch unless there is a documented and approved exception.
• Medium: Define a remediation deadline based on exposure and business impact.
• Low: Track through the normal security maintenance process.

The exact SLA should come from the organization's risk policy rather than applying an arbitrary "24-hour" rule to every application.

For leadership, the important questions are straightforward:

• What was found?
• What was fixed?
• What was retested?
• What remains?
• Who accepted the remaining risk?

A security report identifies problems. The release decision determines whether the remaining risk is acceptable.

When Should Security Testing Happen?

Healthcare application security testing should not start a few days before launch. By that point, fixing a serious issue may require changes to APIs, permissions, data flows, or even the application architecture.

A more practical approach is to bring security into the development process at the stages where changes can still be made without disrupting the release.

• During development: Check authentication, authorization, API access, and sensitive data handling as features are built.
• During integration testing: Test how the application exchanges information with EHRs, FHIR APIs, third-party services, and other connected systems.
• Before release: Perform deeper security testing across the complete application and validate high-risk findings.
• After remediation: Retest important fixes instead of assuming that a code change resolved the vulnerability.
• After major updates: Reassess security when new features, integrations, or significant architectural changes are introduced.

This makes security part of the development lifecycle rather than a final hurdle before production.

The Application Security Testing Checklist Every Healthcare Executive Should Review

A security assessment can contain hundreds of technical findings. CEOs and CTOs do not need to interpret every scanner result. They need clear answers to the questions that affect production risk.

Before approving the application, ask:

1. Can one patient access another patient's information?
2. Can any user act in their assigned role?
3. Does logout actually terminate access to protected information?
4. Can expired or revoked credentials still be used?
5. Where is sensitive patient information stored?
6. Does the API return more information than the application actually needs?
7. What information can third-party services access or transmit?
8. Are EHR, EMR, FHIR, and HL7 integrations restricted to the correct users and resources?
9. Have critical and high-risk findings been fixed and retested?
10. Is there a clear decision on the remaining security risks?

If the answers are unclear, the organization does not yet have enough information for a confident security sign-off.

Conclusion

Before a healthcare app goes live, healthcare application security testing should verify that sensitive patient information is protected, access boundaries work as intended, connected systems are properly secured, and significant risks have been addressed. In my experience, security works best when it is considered throughout the product lifecycle rather than treated as a final pre-launch task. If you are building or improving a healthcare application, Bacancy Technology can help you plan, build, test, and strengthen the product with Healthcare Mobile App Development Services, with security considered throughout the product lifecycle.