As SaaS companies grow, they add new features, APIs, integrations, cloud services, and user workflows. Each change can introduce new security risks, making the timing of VAPT an important part of an ongoing security program.
In this blog, we explain how often growing SaaS companies should perform VAPT testing, which changes should trigger an additional assessment, and how to combine periodic penetration testing with ongoing security checks.
1. At Least Once Every Year
A comprehensive VAPT should generally be performed at least once a year to review the security of the application, APIs, infrastructure, and key security controls. However, annual testing should be combined with additional assessments when major changes occur.
2. Before Major Product Launches
Before launching a major product or a significant new version, security testing can help identify vulnerabilities before customers begin using the updated application. This is especially important when the release introduces new authentication, payment, data processing, or administrative features.
3. After Major Application Changes
Major code changes can affect existing security controls and application workflows. A focused VAPT after significant updates can help identify vulnerabilities introduced by new features, modified access controls, or changes to application architecture.
4. After Significant API Changes
Adding new API endpoints or changing existing API functions can create new security risks. Testing should cover API authentication, authorization, input validation, rate limiting, token handling, and data exposure.
5. After Cloud or Infrastructure Changes
Cloud migrations, new services, network changes, and infrastructure updates can alter the application’s security exposure. A security assessment after significant infrastructure changes can help identify configuration issues, excessive permissions, exposed services, and access control weaknesses.
6. After Major Authentication Changes
Changes to login systems, MFA, SSO, password recovery, session management, or authorization should trigger additional security testing. These controls protect customer accounts and can affect access across the entire application.
7. After Adding Payment Functionality
Payment features handle sensitive transactions and often involve third-party services. VAPT can assess payment workflows, transaction controls, authorization, and business logic for possible abuse.
8. After Adding Third-Party Integrations
Third-party integrations can introduce new APIs, data flows, authentication methods, and trust relationships. Security testing can help verify that these connections do not create unintended access paths.
9. After Major Database or Architecture Changes
Changes to databases, microservices, application architecture, or data flows can affect existing security controls. A focused assessment can help identify issues caused by these structural changes.
NIST guidance identifies significant system changes and newly developed systems among situations where additional security assessment activities may be appropriate.
10. Following a Security Incident
After a security incident, VAPT can help determine whether vulnerabilities remain or whether related weaknesses exist elsewhere in the application. Testing should also verify that corrective actions have addressed the identified security gaps.
11. When Required by Customers or Compliance Programs
Enterprise customers, regulators, and compliance programs may request recent penetration testing reports. SaaS companies should plan assessments according to these requirements so that current security evidence is available when requested.
For many SaaS companies, an annual comprehensive VAPT provides a useful baseline, but it should not be the only security activity. Additional testing may be appropriate after major changes, security incidents, or specific customer and compliance requirements.
Why Annual VAPT Alone May Not Be Enough?
A yearly VAPT provides a useful security review, but SaaS applications can change many times during the year. New features, APIs, dependencies, and infrastructure updates may introduce risks before the next scheduled assessment.
1. SaaS Products Release Changes Throughout the Year
Growing SaaS companies may release features and code updates frequently. Vulnerabilities can therefore appear between annual assessments.
2. New Vulnerabilities Can Affect Existing Components
A previously tested application can become exposed when new vulnerabilities are discovered in its frameworks, libraries, servers, or other components.
3. Dependencies and Third-Party Services Change
Updates to open-source packages, SaaS providers, payment services, and other integrations can change the application’s security profile.
4. Cloud Configurations Can Change Without Application Code Changes
Security risks can arise from changes to IAM permissions, storage settings, network rules, exposed services, or other cloud configurations even when application code remains unchanged.
5. New Attack Techniques Can Affect Existing Systems
Attack methods continue to change. A previous assessment cannot guarantee that an application remains secure against every new attack technique.
A yearly penetration test provides a point-in-time assessment. It should be supported by security testing throughout development and deployment. OWASP recommends integrating security testing into the software development lifecycle and using appropriate testing methods throughout the application lifecycle.
How to Build a VAPT Schedule for a SaaS Company?
A VAPT schedule should match the company’s release cycle, technology changes, customer requirements, and security risks. The following steps can help create a practical testing plan:
1. Schedule a Comprehensive VAPT Annually
Set a recurring annual assessment covering the application’s major attack surfaces, including web applications, APIs, authentication, authorization, business logic, and relevant infrastructure.
2. Add Testing After High-Impact Changes
Create clear triggers for additional testing after major releases, architecture changes, new APIs, authentication updates, cloud migrations, or payment functionality changes.
3. Include APIs and Cloud Assets in the Scope
Do not limit the assessment to the primary web application. Include APIs, cloud resources, administrative interfaces, and other important assets within the agreed scope.
4. Track Vulnerabilities Between Assessments
Maintain a record of identified vulnerabilities, remediation progress, security fixes, and outstanding risks between formal VAPT assessments.
5. Retest Security Fixes
After vulnerabilities are fixed, perform retesting to confirm that the security issue has been resolved and that the fix has not introduced another problem.
6. Review the Testing Schedule After Major Business Changes
Changes such as entering a new market, onboarding enterprise customers, handling new types of sensitive data, or expanding the product can require a review of the existing VAPT schedule.
Common Mistakes SaaS Companies Make With VAPT Frequency
Some organizations follow a fixed testing schedule without considering changes to their applications and infrastructure. The following mistakes can leave security gaps unaddressed:
1. Waiting Several Years Between Assessments
Long gaps between assessments can leave newly introduced vulnerabilities undetected for extended periods.
2. Treating Automated Scanning as a Replacement for VAPT
Automated scanning can identify many known technical issues, but it may not detect business logic flaws, workflow abuse, or complex attack paths that require manual testing.
3. Testing Only the Main Web Application
A SaaS platform may include APIs, cloud infrastructure, administrative portals, mobile interfaces, and third-party integrations. Excluding these areas can leave important attack surfaces untested.
4. Excluding APIs From the Assessment
APIs often provide direct access to application functions and data. They should be included in VAPT when they are part of the product’s architecture.
5. Ignoring Business Logic
Security issues can exist within legitimate application workflows, such as payments, subscriptions, account changes, approvals, and usage limits. These issues require testers to understand how the application is expected to operate.
6. Skipping Retesting After Remediation
A vulnerability should not simply be marked as fixed based on a developer’s update. Retesting provides confirmation that the security issue has been properly addressed.
7. Continuing With the Same Scope After Major Product Changes
A VAPT scope should be reviewed whenever the application’s architecture, features, APIs, cloud environment, or integrations change significantly.
Why Should Growing SaaS Companies Combine Annual VAPT With Ongoing Security Testing?
A practical security program can combine annual comprehensive VAPT, change-triggered penetration testing, automated security checks, dependency monitoring, and remediation retesting. This approach helps companies maintain security coverage as their applications, infrastructure, and customer base expand. OWASP’s guidance similarly promotes ongoing security testing rather than relying on a single assessment.
Conclusion
For a growing SaaS company, VAPT should not be treated as a once-in-several-years activity. An annual comprehensive assessment is a useful baseline, while major releases, architecture changes, new APIs, cloud changes, and security incidents may require additional testing.
Combining scheduled VAPT with continuous security checks allows SaaS teams to identify issues earlier and verify that important changes have not introduced new security weaknesses.
Looking for VAPT testing for your SaaS application? Contact Peneto Labs to assess your web applications, APIs, cloud infrastructure, and critical security controls.