CREST-accredited cloud penetration testing
Web application penetration testing service
CodeShield delivers CREST-accredited web application penetration testing to businesses across the UK, from B2B SaaS platforms and FinTech products to the portals and internal tools your customers rely on every day.
Our testing is hands-on and OWASP-led, going far beyond automated scans to find the vulnerabilities that actually put your data and users at risk. No false positives, no fluff. Just clear, prioritised findings and practical remediation advice from a dedicated expert who works with you from scoping through to fixing every issue we find.
WHY TRUST CODESHIELD
Trusted & Independently verified.
Client’s we’ve worked with.
CREST-accredited penetration testing you can trust
When it comes to security testing, credentials matter. CodeShield is a CREST-accredited penetration testing company, holding one of the most respected accreditations in the industry.
CREST accreditation isn’t a badge you buy. It’s independent proof that our methodologies, technical expertise, data handling, and quality processes have been rigorously assessed against internationally recognised standards. For you, it means the testing of your web application is carried out to a benchmark your clients, auditors, and stakeholders already know and trust.
Why CREST accreditation matters for your business:
- Independent assurance: your testing is validated against standards set and monitored by the industry’s leading not-for-profit accreditation body.
- Procurement-ready: many enterprise customers and public sector frameworks require, or strongly prefer, a CREST accredited provider before they’ll engage.
- Compliance confidence: CREST accredited testing supports frameworks like ISO 27001, SOC 2, and PCI DSS, giving auditors the credible evidence they’re looking for.
- Certified people, not just a certified company: our testers hold individual industry certifications from bodies including CREST and Offensive Security, so your project is always in expert hands.
When you choose CodeShield, you’re partnering with a trusted UK security consultancy that combines independent accreditation, technical excellence, and clear guidance to protect your business against real-world threats.
Web application penetration testing for software and data-driven businesses
Web application penetration testing matters most to organisations that build, sell, or depend on software, especially those handling sensitive data or selling into regulated markets.
If your application processes sensitive customer data, sits behind an enterprise procurement process, or is central to how you do business, web application penetration testing should be part of your security programme.
Meet your compliance requirements with confidence
Many organisations first come to us because a customer, auditor, or framework requires independent testing of their web application. We make that requirement straightforward to meet, and turn it into genuine security improvement.
Our web application penetration testing supports:
You’ll receive a clear, audit-ready report that maps findings to the standard you’re testing against, plus practical remediation advice to close the gaps, not just document them.
WHY CODESHIELD – 20+ YEARS EXPERIENCE
You work with the person doing the testing.
At CodeShield, our UK penetration testing team brings 20+ years of combined expertise delivering practical, results-driven security solutions tailored to your business.
You work directly with a fully-qualified pen tester. You meet them before you pay, so you know who you’re working with.
TRUSTED UK PENETRATION TESTERS
Contact CodeShield today to get a quote or work with us
At CodeShield, our UK penetration testing team brings 20+ years of combined expertise delivering practical, results-driven security solutions tailored to your business.
What makes our web application penetration testing different
Our Values
What’s in your web application penetration testing report
The report is where a penetration test earns its value. A test is only as useful as the document that comes out of it, and ours are built to be read and acted on, not filed away. Every engagement ends with a clear, structured report that works for your development team and your senior stakeholders alike.
See a sample report
Want to see the quality of our reporting before you commit? Download an anonymised sample web application penetration testing report and see exactly what you’ll receive: the structure, the depth of detail, and the clarity of our remediation advice.
START HERE
Not sure which test you need?
Most people searching “pen test” aren’t sure yet, that’s normal. Pick the closest match, or talk it through directly with a tester. We can incorporate multiple testing types for a single project. We often do web app + network testing if a business wants to cover both.
When do you need a web application penetration test?
Web application penetration testing isn’t a one-off box to tick. It’s something to build into the key moments in your application’s life. You should consider a test when:
- You’re launching a new application or major feature: test before it’s exposed to real users and real attackers, not after.
- You’re preparing for a compliance audit: ISO 27001, SOC 2, PCI DSS and similar frameworks expect independent testing as part of certification.
- A customer or partner is asking for it: enterprise procurement and due diligence increasingly require evidence of web application testing before they’ll sign.
- You’ve made significant code changes: new releases, refactors, or third-party integrations can introduce vulnerabilities that weren’t there before.
- You’ve added or changed APIs: every new endpoint is a new part of your attack surface that needs testing.
- You’ve had a security incident: verify that the gap is closed and check for anything else an attacker may have reached.
- It’s simply been a while: best practice is at least once a year. If you can’t remember your last test, you’re overdue.
Not sure which of these applies to you? A quick scoping conversation will tell you what you need, and just as importantly, what you don’t.
LIVE REPORTING
Stay informed throughout your penetration test with real-time access to findings through our secure client portal.
As vulnerabilities are identified, they’re immediately available for your team to review, giving you complete visibility into the assessment as it progresses. Any High or Critical findings are communicated straight away via your agreed contact channels, ensuring urgent risks are never left waiting until the final report.
Our collaborative approach also allows for interactive re-testing during the engagement. As fixes are implemented, our consultants can validate them in real time, helping to reduce outstanding vulnerabilities before testing is complete.
At the end of the engagement, your portal is updated with the final quality-assured report, providing a comprehensive record of the assessment, findings, remediation guidance, and supporting evidence.
TRUSTED UK PENETRATION TESTERS
Contact CodeShield today to get a quote or work with us
At CodeShield, our UK penetration testing team brings 20+ years of combined expertise delivering practical, results-driven security solutions tailored to your business.
Web application penetration testing FAQs
In black box testing the tester has no prior knowledge of the application. In white box testing they have full access to code and documentation. Grey box sits in between, with partial knowledge for a realistic yet efficient assessment. We’ll help you choose the right approach for your goals during scoping.
Wherever possible we test in a staging or non-production environment to avoid any disruption. If production testing is necessary, we agree all precautions with you during scoping to keep your application stable throughout.
Yes. Our support doesn’t end at the report. Once you’ve addressed the findings, we can retest to confirm the fixes are effective, giving you and your stakeholders verified assurance that the risks have been closed.
Yes. APIs are one of the most common sources of serious vulnerabilities, so every connected endpoint receives the same scrutiny as the application itself, including tests for authentication gaps, excessive data exposure, and broken object-level authorisation.
A vulnerability scan is automated and flags known issues. A penetration test adds expert human analysis, actively exploiting weaknesses to understand the real business impact and uncovering the business-logic and chained vulnerabilities that scanners simply cannot find.
The cost depends on scope: the size and complexity of the application, the number of user roles and APIs, and the depth of testing required. Rather than quote a misleading flat rate, we scope every engagement individually so you only pay for testing that delivers real value. Get in touch for a tailored quote.
