Worldpay Integration Penetration Testing
Worldpay integrations tend to be older than the rest of the stack, which is the point. Long-lived payment code accumulates assumptions, and the oldest assumption is usually that the response coming back can be trusted. CREST-certified testers, fixed price from £2,960, scoped in 24 hours.
- Unlimited retesting
- No rescheduling or cancellation fees
- Fixed quote within 24 hours
“I would highly recommend EJN Labs to any organisation seeking reliable, detailed, and well-managed penetration testing services, particularly for government or enterprise-level projects.”
Imran SaghirProject Lead, SquareOne“There wasn’t another company we could find that could deliver what we needed in the timeframe we needed. The client loved it, and we got instant ROI from the engagement.”
Dan WilcocksonCo-Founder, CelloriPayment integrations get written once and then left alone, because nobody wants to touch the code that takes the money. That is understandable and it is also why these integrations carry the oldest security assumptions in the application.
Why long-lived payment code needs attacking
The assumption worth testing first is trust in the response. Whether you are on a hosted payment page returning the customer to a success URL, or receiving order notifications server-side, the question is the same: is the result validated against Worldpay, or believed because it arrived.
We then work the amount, the 3-D Secure result and the stored token. Where cardholder data is anywhere near your infrastructure, findings are mapped to PCI DSS and written for a QSA.
ISO 27001, SOC 2, PCI DSS and Cyber Essentials Plus audits accept manual penetration test evidence. Scan-only evidence is generally insufficient.
RESPONSES, AMOUNTS + TOKENS
What we actually pen test on a Worldpay integration
Manual pen testing across response and notification validation, amount integrity, 3-D Secure handling, tokenised card storage and credential exposure.
Response and notification validation
Whether payment results are verified against Worldpay rather than trusted from the returning request, signature or MAC validation where used, replay of a successful response, and what a forged success achieves.
Amount and order integrity
Whether the amount and currency are recomputed server-side, order reference generation and predictability, tampering between cart and payment page, and reuse of a completed order reference.
3-D Secure and authentication result
Whether the authentication result is validated, exemption and frictionless handling, and whether a failed or absent authentication can still yield a completed order.
Tokenisation and stored cards
How tokens are stored and scoped, whether one customer can use another’s stored card, and whether any part of the flow pulls primary account numbers into your scope unnecessarily.
Credentials and configuration
Merchant credentials, XML and API passwords, installation identifiers, where they are stored, whether they have reached version control, and separation between test and production configuration.
Refunds and back office
Refund and cancellation authorisation, whether a customer can trigger a refund against another order, and access control on any internal payment administration screens.
METHODOLOGY
Worldpay Integration Penetration Testing: From Scope to Attestation
CREST-aligned methodology built on OWASP Web Security Testing Guide, OWASP ASVS, NIST SP 800-115, and PTES. Each finding maps to all four standards plus your specific compliance regime.
Reconnaissance
Application mapping, technology fingerprinting, content discovery, parameter enumeration, authentication-flow analysis, role-matrix construction.
Vulnerability Assessment
Authenticated and unauthenticated automated scanning across every user role, plus targeted manual checks for known weakness patterns.
Manual Exploitation
Hands-on testing by a CREST-certified pentester. Business-logic exploitation, chained vulnerabilities, privilege escalation, impact validation.
Reporting + Retest
Executive summary, technical report with CVSS scores and reproduction steps, walkthrough call, free retest after remediation, attestation letter.
CREDENTIALS
Verified Accreditations Auditors Accept
Every credential below is independently verifiable. UK procurement teams, FCA supervisors, ISO 27001 / SOC 2 auditors, and cyber insurance underwriters all recognise these standards.
GET YOUR QUOTE
Get a CREST Worldpay integration pen test quote in 24 hours
A fixed-price quote back in one business day, from a named CREST assessor. No sales pipeline, no chasing.
- CREST and IASME accredited. Testing your auditors and clients already recognise.
- Fast-track testing within 24 hours where required. Free retest of every fix included.
- Live findings via your client portal, not a four-week PDF.
- Fixed price from £3,500 for a single-role, single-app scope, agreed up front. Most engagements run £5,000 and up. No day-rate surprises.
Dan WilcocksonCo-Founder, CelloriUnder NDA Further named references available on a scoping call.
- We reply within one business day with a fixed-price quote from a named CREST assessor.
- You approve the scope and we book a start date, usually within 24 hours.
- Live findings land in your client portal as we test, with a free retest of every fix.
Get your fixed pen test quote in 24 hours
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COMPLIANCE READY
Reports Mapped to Every Framework
Findings are explicitly tagged to the relevant control reference. Your audit team submits the report directly without translation work.
ISO 27001:2022
Annex A.8.8 management of technical vulnerabilities plus A.5.15-5.18 and A.8.2-8.5 access control validation.
SOC 2 Type I & II
CC6 logical access, CC7 system operations, CC8 change management evidence.
PCI DSS
Requirement 11.4 application penetration testing across cardholder data environments, including ecommerce penetration testing for online retail platforms.
FCA SYSC
SYSC 4.1.1R, 6.1.1R, 13 mapped to each finding for FCA-regulated firms.
UK GDPR
Article 32 effectiveness testing, customer-data security controls, ICO-acceptable evidence.
Cyber Essentials Plus
Direct certification through our IASME body status, single-vendor delivery.
PRICING
Transparent Worldpay Integration Penetration Testing Pricing
Pricing depends on app complexity, user-role count, business-logic depth, and integration surface. The day count flexes; the included deliverables stay the same across all engagements.
2 to 3 testing days
Single user role, basic CRUD application, marketing website with auth. Around 5 working days from kickoff to report.
Get a fixed quote3 to 5 testing days
Multi-role SaaS, business application with payment integration. Around 8 to 12 working days from kickoff to report.
Get a fixed quote5 to 7 testing days
Multi-tenant platform, complex authorisation matrix, integration-heavy applications. Around 15 to 20 working days from kickoff to report.
Get a fixed quotePart of Technologies We Pen Test. These are examples of the stacks we publish pages for, not a complete list. If yours is not here we still test it. Related pages:
BY SECTOR
Worldpay Integration Penetration Testing for Your Sector
Sector-specialist scoping for UK businesses with sector-specific compliance regimes and threat models.
Fintech & FCA-Regulated
FCA SYSC, Open Banking FAPI 1.0, PSD2 SCA, payment-flow scrutiny, KYC/AML testing.
Fintech sector pageSaaS Companies
SOC 2 Type I & II evidence, multi-tenant boundaries, role escalation, customer-tenant isolation.
SaaS sector pageLaw Firms
SRA Cyber Standard, privileged data, conveyancing fraud defence, partner-tier procurement.
Law firm sector pageHealthcare
NHS DTAC, DSP Toolkit v6, UK GDPR Article 32, EHR systems, telehealth platforms.
Healthcare sector pageInsurance
FCA / PRA Operational Resilience, cyber underwriting, claims data, broker portals.
Insurance sector pagePublic Sector
CCS / G-Cloud framework, NCSC-aligned, citizen-facing services, PSN-compliance scrutiny.
Public sector pageWHY EJN LABS
What You Get From Worldpay Integration Penetration Testing
Six concrete differentiators competitors don’t all match.
CREST-Certified Testers, Verifiable
Every test by a CREST-certified pen tester (CRT, CCT APP, CCT INF where applicable). Verify our company status at crest-approved.org.
24-Hour Startup, Where Required
From signed scope to active testing in a single business day for incident response, audit deadlines, or regulator-driven timelines.
Live Findings, Not 4-Week PDFs
Critical issues reported during testing through your client portal. Your team remediates while testing continues.
Audit-Ready Reports
Executive summary plus full technical report with CVSS scores and explicit framework mappings (ISO 27001, SOC 2, PCI DSS, FCA SYSC).
Free Retests, Standard
Verify remediation of every finding before close-out. Letter of attestation for audit submission included. Most competitors charge £1,500-£3,000 per retest.
UK-Based CREST Testers
Every engagement performed by vetted, UK-based CREST-certified testers, matched to your needs, security clearance, and compliance scope.
FAQ
Frequently Asked
Which Worldpay products do you cover?
The current Access Worldpay APIs and the older Business Gateway and Corporate Gateway integrations still widely in production. Legacy integrations are often where the more serious findings are, so we welcome them.
Can you test in a sandbox?
Yes, and we prefer to. Worldpay’s test environment supports the response and notification flows we need, including forged response testing, with no real money involved.
Does this reduce our PCI scope?
Testing does not change scope, but it frequently reveals that your scope is larger than you believed, usually because card data is passing through a server that nobody counted. That finding alone often pays for the engagement.
We are migrating from Business Gateway. Should we test now or after?
Both, ideally. Testing the legacy integration tells you what you are carrying, and testing the new one before cutover stops you carrying it forward. We can scope them as one engagement across two phases.
What do we receive?
A report mapped to PCI DSS Requirement 11.4, ISO 27001 and Cyber Essentials where relevant, a technical write-up with reproduction steps, and unlimited free retesting.
20+ CREST-accredited testing services in one place
Web, mobile, API, cloud, AI, infrastructure, red team. Pick the test that fits your environment.
Get a fixed price for your Worldpay integration
Tell us which Worldpay product you integrate with and whether tokenised cards are in play. Fixed-price quote from a named CREST assessor within one business day.
