Find the Flaws Automated Scanners Miss
Web Application Penetration Testing Services
Your web application is the front door to your business, and it is the part attackers probe first. Our certified testers manually assess login flows, APIs, forms and back end logic, so you can fix what matters before someone else finds it.
- Certified Experts
- OSCP, CEH, CRTP & industry-certified testers.
- Real-World Approach
- Manual testing with real-world attack techniques.
- Actionable Reporting
- Detailed findings with clear risk ratings and remediation.
- Confidential & Secure
- Strict NDA, data protection & privacy practices.
// About Web Application Pentesting
A Manual, Attacker's-Eye View of Your Application
Automated scanners flag the obvious issues. The vulnerabilities that actually cause breaches, a checkout that lets someone alter a price or a user role that quietly escalates itself, only surface under manual testing. Our team works through your application the way a real attacker would, chaining small weaknesses into a genuine security risk rather than handing you a list of low value scanner output.
Whether you operate from London, Manchester, Leeds or anywhere else in the UK, we test in a way that respects your live environment and your customers' data. Every engagement is scoped around your release schedule, your UK GDPR obligations and the parts of the application that matter most to your business.
- Manual, Expert-Led Testing
- Full OWASP-Aligned Coverage
- Zero False Positives
- Clear, Developer-Ready Fixes
// Coverage
What We Cover
Black Box Testing
We test with no prior access, the same way an external attacker would approach your site.
Grey Box Testing
We test with limited user credentials to see what an authenticated user could abuse.
White Box Testing
We review source code alongside the live application for the deepest possible coverage.
Pre-Release Testing
We test staging builds before launch, so issues are fixed before customers see them.
SaaS and Multi-Tenant Testing
We confirm that one customer's data can never bleed into another's.
CMS and E-Commerce Testing
We test WordPress, Shopify, Magento and custom-built storefronts for misconfiguration.
// Methodology
Our Testing Process
- 01
Scoping and Planning
We agree what is in and out of scope, your goals, and any compliance drivers behind the test.
- 02
Reconnaissance
We map the application, its technology stack and every entry point available to a user.
- 03
Vulnerability Discovery
We combine targeted tooling with manual review to identify genuine weaknesses.
- 04
Controlled Exploitation
We safely validate that findings are real and exploitable, without disrupting your live environment.
- 05
Reporting and Retest
You receive a full report with prioritised fixes, followed by a free retest once remediation is complete.
// Ready when you are
Put your web application penetration testing services to the test.
// Impact
Why Web Application Security Testing Matters
A Single Flaw Can Expose Everything
One broken access control check can let an attacker reach every customer record behind your login page.
// How We Test Your Application
- Application reconnaissance and attack surface mapping
- Authentication and session management testing
- Authorisation and access control validation
- Input validation and injection testing
- Business logic and workflow abuse testing
- Client-side security review across JavaScript, CSP and the DOM
- Manual exploitation and proof-of-concept validation
What you get
// Tools We Use
// Why Choose Pluto Cyber Security
A Testing Partner UK Businesses Trust
Businesses across the UK choose us because we focus on real security outcomes, not padded reports. Our testers hold recognised certifications, work to a CREST-aligned methodology, and explain every finding in language your developers and your board can both act on.
Certified Testers
Our consultants hold OSCP, OSWE, CISSP and CEH application security certifications.
Real Attack Simulation
We exploit SQL injection and broken access control, not just scan for them.
Actionable Reporting
Every finding maps to a clear remediation step your developers can act on immediately.
Confidential by Default
Your application data and credentials stay protected under strict NDA throughout testing.
It covers authentication, access control, input handling, session management, business logic and server configuration, essentially every way a user or attacker can interact with your application.
// Related services
Explore Related Services.
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Ready to Scope Your Web Application Penetration Testing Services?
Tell us what you need tested. We reply with honest guidance and a fixed-scope quote, usually within one business day.