Web Application Security Audit: What It Includes, Duration, and When You Need It

A web application security audit is a professional verification of whether an unauthorized person can access data in your application they should not see, take over someone else's account, or abuse functionality. It is intended for online stores, customer portals, internal tools, and increasingly, applications created using AI tools.

TL;DR — Key Takeaways

• The audit checks login, access rights, input processing, server configuration, and dependencies.
• The baseline is the OWASP Top 10 — the list of the most common web application vulnerabilities.
• For a smaller application, an audit usually takes 2 to 5 working days.
• The result is a report featuring vulnerabilities, severity ratings, and concrete fixes.

When You Need a Security Audit

• Before publishing a new application or a major upgrade.
• When the application processes personal data, payments, or business secrets.
• When the application was developed quickly, using no-code or AI tools.
• When required by a client, insurer, or compliance standards (NIS2, ISO 27001).
• Following a security incident or suspicion of one.

What the Audit Includes

How It Works

1. Introductory call: application purpose, user types, scope, and test environment.
2. Audit: a combination of automated tools and manual testing.
3. Report: every finding with proof, severity rating, and suggested fix.
4. Presentation: we explain the findings to management and developers.
5. Retest: after fixes, we verify that the holes are closed.

What Determines the Price

The price is determined by the application size, number of user roles, API scope, and whether the audit also includes infrastructure. A smaller application with one type of user is audited significantly faster than a portal with multiple roles and integrations. However, an audit is always cheaper than a customer data leak incident.

Security of applications made with AIThe most common mistakes in AI-generated applications.

Frequently Asked Questions

Does the audit affect application performance?

We carry out the audit carefully, by agreement in a test environment or outside working hours, so the impact is minimal.

Do you need access to the source code?

Not necessarily. An audit is possible without code, but with code access, it is more thorough.

How often should the audit be repeated?

With every major change and at least once a year for applications containing customer data.