VAPT & Penetration Testing Checklist Before Your SaaS Launch

Launching a SaaS product is exciting, but security should be checked before going live. A single security weakness can expose customer data, damage your reputation and cause costly problems. That’s when VAPT (Vulnerability Assessment and Penetration Testing) comes in handy. It helps find security issues in your SaaS app, servers, APIs and network. Vulnerability assessment finds possible weaknesses, while penetration testing checks whether they can actually be exploited, both are crucial for your SaaS project. Testing before launch helps you find and fix security problems early. In this post, we are sharing a VAPT and penetration testing checklist to follow before launching your SaaS product. Let’s dive in…

VAPT & Penetration Testing Checklist to Follow Before Your SaaS Launch

Here are the things that you need to check before launching your SaaS product to identify and fix security issues early. Take a look…

1. SaaS Application

The process must begin with the application itself, especially if your SaaS platform has many features, pages and user actions. Test the areas where users enter, view or change information.

Check whether or not:

• Users can access only the features they are allowed to use.
• Login and logout work correctly.
• Password reset links are secure. 
• Customers cannot see each other’s information. 
• Important actions are allowed only for authorized users.
• Input fields safely handle unexpected or harmful data.
• Error messages do not reveal sensitive technical information.
• File uploads are properly checked and protected.
• Session information is handled safely.
• Sensitive information is not unnecessarily displayed.

Pay attention to user profiles, dashboards, payment pages, admin panels and account settings as they contain important customer data and need careful testing.

2. Test Login and User Access

Login security is very important for any SaaS product. If attackers can easily access an account, other security measures may not help. Test login security for all types of users, including customers, managers, admins and support staff.

Check whether a user can: 

• Access another user’s account.
• Change information they should not be able to change.
• Open an admin page without permission.
• Continue using an account after logout.
• Reset another person’s password.
• Guess passwords through repeated login attempts.
• Use an old password reset link.
• Bypass additional login security.

Additionally, do test multi-factor authentication to make sure the extra security step cannot be easily bypassed.

3. Check User Permissions

More often than not, a SaaS security problem occurs when users can access other users’ information. Normally, users are allowed to access information or make changes to their own profiles only. However, if a user can access or check other customer’s information (personal or professional), then there is a dire need to test every important action with different user roles.

Check whether:

• A user can see a particular information.
• They can change it.
• They can delete it any information.
• Perform a particular action.

Permissions should be checked on the server, not just hidden in the interface. Hiding a button does not stop users from accessing the function directly.

4. Test Your APIs

Most modern SaaS products depend on APIs as they connect the front end of the application with databases, mobile apps, payment systems and other services. This makes it crucial to check API security. Following API security best practices can help protect authentication, authorization, data and API requests.

Check whether or not your APIs:

• Require proper authentication.
• Check user permissions.
• Protect sensitive information.
• Reject invalid requests.
• Limit repeated requests where necessary.
• Prevent users from accessing other customers’ records.
• Handle errors safely.
• Avoid exposing unnecessary information.
• Properly validate uploaded files and other inputs.

Make sure to test older, less-used and internal APIs as well. This is because an overlooked API can become an easy target for an attacker.

5. Review Input and Data Handling

SaaS applications receive a lot of information, such as names, email addresses, passwords, search terms, comments, documents, payment information and other business data from users. Any place where users can enter information should be tested, such as forms, search boxes, URL parameters, file uploads, comments, support forms and API requests. This ensures that the app does not treat unsafe user input as trusted data. Also, check that unusual input does not crash the app or reveal sensitive information.

6. Check Database Security

If the database in your SaaS platform contains valuable information, such as customer details, account information, business records, passwords, payment-related information or private documents, then check that too. 

Check whether: 

• The right people have access to the database.
• Unnecessary users do not have access to the database.
• Sensitive information is protected.
• Passwords are stored securely.
• Database accounts use strong credentials.
• Unnecessary database services are disabled.
• Backups are protected.
• Customer data is properly separated.

Remember that a poorly protected database can become an entry point for attackers. Hence, it is important to ensure your database is protected. 

7. Test Your Cloud and Server Setup

Most modern SaaS applications run on cloud. Hence, it is crucial to test your cloud environment as well. It often includes, reviewing servers, storage, databases, containers, networks and other cloud resources.

Check whether there are:

• Publicly accessible storage.
• Unnecessary open ports.
• Weak administrator access.
• Unused accounts.
• Incorrect security settings.
• Exposed passwords or access keys.
• Old software and systems.
• Services that do not need public access.

Make sure to keep development, testing and production environments separate. A weakly secured development system can put important systems at risk.

8. Check for Exposed Secrets

Developers use passwords, API keys and other secrets while building software. Make sure none of these secrets are left in the code, files or public repositories. Before launch, check for, Passwords, API keys, Access tokens, Cloud credentials, Database credentials, Private certificates and Encryption keys.

If a secret is exposed, deleting it from the current code will not be enough. It may still exist in old versions or system history. Therefore, you are advised to replace the exposed secret and check where else it was used.

9. Check Data Encryption

Sensitive customer data should also be protected and it should be protected both during transfer and storage.

Check whether:

• HTTPS is properly enabled.
• Sensitive data is protected during transmission.
• Sensitive stored data is protected where required.
• Passwords are securely hashed.
• Encryption keys are properly managed.
• Old or unsafe security settings have been removed.

Encryption should be part of your SaaS security plan from the start and should never be overlooked in the process.

10. Test File Uploads and Downloads

File upload features can also pose unexpected security risks. If your SaaS product allows customers to upload images, documents, spreadsheets or other files, test whether the system properly checks those files.

Check whether there are:

• File type restrictions.
• File size limits.
• File names.
• Storage location.
• Access permissions.
• Download permissions.
• Malicious files.
• Uploaded files can run on the server.

Besides that, you also need to make sure that customers cannot access another customer’s files by changing the file name or ID.

11. Review Third-Party Services

If your SaaS application depends on third-party services, such as payment gateways, email services, analytics tools, cloud providers, authentication services and so, then it is crucial to review them too. List all external services your product uses and check: 

• Information shared with the service
• Reason for sharing the information
• Permissions given to the service
• Protection of API keys
• Impact of a third-party service being compromised
• Removal of unused integrations

Of course, you cannot control another company’s security, but you can always limit the data and access you share with it.

12. Check Security Headers and Basic Web Settings

These website security practices can add another layer of protection against common web attacks. Some security steps are simple but are often overlooked, such as your security headers and basic web settings. Hence, it is crucial to check your website and app settings for:

• Secure cookie settings
• Protection against unwanted cross-site requests
• Browser security headers
• Safe content policies
• Proper HTTPS configuration
• Protection against clickjacking. 

Checking these settings can add another layer of protection against common web attacks.

13. Look for Outdated Software

Your SaaS product may use third-party frameworks, libraries, plugins and other software. Before launch, check their versions for known security issues. Remove anything you do not need and update outdated software. Even new applications can have security problems if they use old or unsafe components.

14. Test Rate Limits

Some parts of a SaaS app should have request limits. This includes login, password reset, OTP and certain API functions. Check that users cannot send too many requests in a short time. This helps prevent password guessing, misuse and extra pressure on your systems.

15. Test the Admin Panel as Well

Your admin panel should also be checked as it has access to important settings and sensitive data. 

Check whether:

• Admin accounts use strong authentication.
• Admin functions have proper permissions.
• Admin pages are not publicly accessible unless needed.
• Sensitive actions are logged.
• Old admin accounts are removed.
• Password recovery is secure.
• Admin APIs are properly protected.

If possible, try keeping admin access separate from customer access and allow it only to trusted users and systems.

16. Review Logging and Monitoring

Finding vulnerabilities may not be just enough. Your team must also know when something unusual happens. Check whether important events, such as failed login attempts, successful administrator logins, password changes, permission changes, important account changes, large data downloads and suspicious API activities are all recorded.

Besides that, you must avoid storing unnecessary sensitive data in logs. Also, logs should be protected as they may contain important information about your systems and customers.

17. Perform a Final Penetration Test

Once major security issues have been fixed, it’s time for performing a final penetration test. The testing team should check your SaaS product from an attacker’s point of view and carefully test its security controls. The test should cover areas such as:

• Web application
• APIs
• Authentication
• User permissions
• Cloud infrastructure
• Network security
• File handling
• Business logic
• Administrative functions

This can help fix the security issues found during testing and ensure that your SaaS application is ready for the launch.

18. Retest After Fixing Problems

Once you have fixed all the problems found during testing, it’s time for retesting the whole thing. 

Even after fixing all the security issues found during testing, do a retest. This confirms that the fixes work properly and have not created new problems. A final retest gives you more confidence before launching your SaaS product.

VAPT Checklist: Quick Overview

Here is a quick review of VAPT checklist so that you don’t miss anything. Take a look… 

What To Do After VAPT?

A VAPT report may contain many issues, but they may not all have the same impact. Understand each issue and its possible risks. Fix the most important security issues first and have your development and security teams check the fixes. Make sure you maintain records of the following:

• The security issue found.
• The affected application or system.
• The risk involved.
• The person responsible for fixing it.
• The date it was fixed.
• The retest result.

Keeping records helps your team track security issues, confirm that they are fixed and avoid missing important problems before launch.

The Bottom Line

So, there you have it: VAPT & Penetration Testing checklist that you should follow before your SaaS launch. Security should not be the last step before a SaaS launch; in fact, you should make it the part of the development process from the start. VAPT and penetration testing come in handy when it is about finding vulnerabilities and issues in your SaaS product. Using them you can find weaknesses in your app, APIs, cloud systems and user permissions before they become major problems. You can use this checklist as a starting point; however, it is worth noting that every SaaS product has different security needs. Your main goal should be to find issues early, fix them properly and test again before launch.

WeeTech Solution

See Full Bio