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Cybersecurity & Compliance

Web Application Security Testing

Deep testing of your web applications against OWASP-class risks — injection, broken access control, authentication flaws, and more — with findings mapped to how your app actually works, not a generic checklist.

Scope a web app pentestAll services
Overview

Beyond what a scanner sees

Web applications are where most real-world breaches begin, and automated scanners only see part of the picture. We test your web app the way an attacker would: probing authentication and session handling, access-control boundaries between users and roles, input handling for injection and cross-site scripting, and the business logic that scanners cannot understand. Our methodology is grounded in widely recognised frameworks such as the OWASP Testing Guide and the OWASP Top 10, so coverage is systematic rather than ad hoc. We test in an environment agreed with you to avoid disrupting production, document each issue with the request/response evidence needed to reproduce it, and rate severity in the context of your application rather than in the abstract. You receive a prioritised report and remediation guidance, and we can validate fixes on a retest.

What’s included

  • Coverage aligned to the OWASP Top 10 and OWASP Testing Guide
  • Authentication, session, and access-control testing
  • Injection, XSS, and business-logic flaw discovery
  • Evidence-backed, reproducible findings
  • Retest to confirm remediation
Who it's for

Teams whose apps carry real risk

  • Product and SaaS teams whose web application handles customer data, payments, or anything a competitor or attacker would want.
  • Companies shipping a significant release or redesign who want the application tested before real users depend on it.
  • Teams whose automated scanner reports look clean but who suspect access-control and business-logic flaws are going unfound.
  • Organisations who need a web application penetration test as evidence for an enterprise customer, auditor, or insurer.
When you need it

Moments that call for a closer look

  • Your application has multiple user roles or tenants and you need to confirm that one customer cannot reach another customer's data.
  • You have added authentication, single sign-on, or a payment flow and want the new trust boundaries tested before launch.
  • A customer's security team has sent a questionnaire asking when your web application was last independently penetration tested.
  • The application grew through years of incremental changes and nobody is confident every endpoint still enforces authorisation correctly.
  • You are migrating to a new framework or rebuilding the front end and want to verify no old vulnerabilities have carried across.
Deliverables

What you get back

Every engagement ends with something your team can act on — not a slide deck.

  • A prioritised report of web application findings with severity ratings and business context, not raw scanner output
  • Request and response evidence for each finding so developers can reproduce the issue directly
  • Remediation guidance written against your stack and framework, with secure-pattern examples
  • Coverage notes mapping what was tested against OWASP Top 10 and ASVS categories
  • An optional retest confirming which issues are closed after your fixes ship
How it works

How we approach your app

The same predictable shape whether the work is an assessment or a build, so you always know what happens next.

  1. 1

    Discover

    We start by understanding your systems, goals, and constraints — scope, risk tolerance, and what success looks like — so the work is aimed at your actual problem, not a generic template.

  2. 2

    Assess or build

    For security work, we test and analyse against recognised standards. For development, we build in small, reviewable increments. Either way, you see progress early and can change direction.

  3. 3

    Report or ship

    You get clear, prioritised deliverables — a report your engineers can act on, or working software shipped to your environment — with the context to understand what was done and why.

  4. 4

    Support

    We stay available after delivery: retesting fixes, iterating on the product, and answering the questions that come up once real users and real traffic arrive.

FAQ

Web App Security — common questions

What does web application security testing cost?

We quote per application after a short scoping conversation, because cost tracks effort rather than a headline rate. The main drivers are the number of distinct user roles and permission levels, how many pages and API endpoints exist behind login, whether we test with credentials, and how much custom business logic needs manual exploration. We give you a fixed quote and scope in writing before testing starts.

Do you test against production or staging?

We usually recommend a production-equivalent staging environment, and we agree this with you during scoping. Staging lets us test aggressively without risking your live data or users, provided it mirrors production configuration and code. Where only production is available, we adjust technique to stay safe: no destructive payloads, controlled request rates, and an agreed testing window with an escalation contact on your side throughout.

How is this different from running an automated scanner?

Scanners find known, pattern-matchable issues; they cannot understand what your application is for. They will not detect that a support agent role can escalate to admin, that changing an ID in a request returns another tenant's invoice, or that a discount workflow can be replayed. We use automation for breadth, then test authentication, authorisation, and business logic manually — which is where the findings that matter usually are.

Which standards does your OWASP testing follow?

Our methodology follows the OWASP Testing Guide, with coverage mapped against the OWASP Top 10 and, where you need deeper assurance, the OWASP Application Security Verification Standard (ASVS). Severity is rated using CVSS and then adjusted for your application's real context, because an issue's impact depends on what data sits behind it. If you must satisfy a specific standard or customer requirement, tell us and we will align reporting to it.
Related services

Often paired with this testing

Teams that come to Safe Tech AI for web app security frequently need these too.

  • API Security Testing

    Testing REST, GraphQL, and internal APIs for authentication, authorization, injection, and abuse risks — the layer that powers your apps and integrations but is easy to expose by accident.

    Learn more

  • Vulnerability Assessment & Penetration Testing (VAPT)

    Simulated attacks that find exploitable weaknesses before real attackers do. We combine broad automated scanning with hands-on manual testing, then hand you a prioritised, reproducible report your engineers can act on.

    Learn more

  • Web Application Firewall (WAF) Setup

    Deployment and tuning of Web Application Firewall rules for your production apps — protection that blocks real attacks without breaking legitimate traffic or drowning you in false positives.

    Learn more

Your scanner report looks clean. Is it?

Book manual testing of authentication, access control, and business logic, mapped to OWASP Top 10 and ASVS, with reproducible evidence for every finding.

Scope a web app pentest