02 // Web Application Security

Your Web Application Is Your Biggest Attack Surface

We test your web apps for the vulnerabilities that lead to data breaches, account takeovers, and compliance failures — then help you fix them.

// The Risk

Why Web Application Security Matters

Your web application is publicly accessible, handles user data, and connects to your backend systems. It's the first thing an attacker targets.

Common issues we see:

  • × Login pages vulnerable to credential stuffing
  • × Admin panels accessible without proper authorisation
  • × Forms that accept malicious input and pass it straight to the database
  • × Session tokens that don't expire or rotate properly
  • × File upload features that accept executable files

These aren't theoretical risks. They're the exact techniques used in real breaches every day.

// Testing Scope

What We Test

Authentication & Session Management

  • Login brute-force protection
  • Password policy enforcement
  • Multi-factor authentication bypass
  • Session fixation and hijacking
  • Token expiration and rotation

Authorisation & Access Control

  • Horizontal privilege escalation (accessing other users' data)
  • Vertical privilege escalation (accessing admin functions)
  • Insecure Direct Object References (IDOR)
  • Missing function-level access controls
  • Role-based access control bypass

Input Validation

  • SQL Injection (union, blind, time-based)
  • Cross-Site Scripting (reflected, stored, DOM-based)
  • Command injection
  • Path traversal
  • Server-Side Template Injection (SSTI)

Business Logic

  • Price manipulation
  • Workflow bypass (skipping steps)
  • Race conditions
  • Coupon/discount abuse
  • Account enumeration
// Real Findings

Common Findings — Real Examples

E-Commerce Platform

FINDING

Stored XSS in product review field

IMPACT

An attacker could inject JavaScript that executes in every customer's browser — stealing session cookies and redirecting to phishing pages.

FIX

Input sanitisation on the server side + Content Security Policy headers.

SaaS Dashboard

FINDING

IDOR on the /api/users/{id}/profile endpoint

IMPACT

Any logged-in user could view and edit any other user's profile by changing the ID parameter. No authorisation check on the server side.

FIX

Server-side authorisation check ensuring the authenticated user can only access their own resources.

Internal HR Portal

FINDING

SQL Injection in the employee search function

IMPACT

Full read access to the database, including salary data, personal details, and hashed passwords.

FIX

Parameterised queries replacing string concatenation in the data access layer.

// Deliverables

What You Get

Detailed Security Report

Every finding documented with severity, evidence, and business impact.

OWASP Top 10 Coverage Matrix

Showing exactly which categories were tested and the results.

Code-Level Remediation

Not "fix the XSS" but "here's the specific code change needed."

Executive Summary

A one-page overview for non-technical stakeholders.

Free Retest

We verify your fixes at no additional cost.

Developer Debrief

A call with your dev team to walk through findings.

Know Exactly Where Your Web App Is Vulnerable

One engagement. Clear findings. Actionable fixes. No fluff.

Fixed pricing from £95 · Free retest included · UK-based