Penetration Testing for Your Technology Stack
Tell us what your product is built on and we will tell you how we test it. CREST-certified testers, the same fixed price and 24-hour scoping whatever the stack, and a report your auditor will accept.
- 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, CelloriBuyers rarely ask for an application test in the abstract. They say they have a React front end on a Node API, or a .NET estate behind IIS, or a Java service running on AWS, and they want to know whether we have tested that before. The answer matters, because the bugs are not the same. The authorisation flaw that hides in a Spring Security matcher does not look like the one that hides in a Django permission class.
Your stack decides what we look for, not how much it costs
What does not change is the shape of the engagement. Scope agreed in 24 hours, a fixed price rather than a day-rate meter, live findings in the portal as we go, an executive summary and a technical report, a walkthrough call, and free retests until the fix lands.
Below are examples of the technologies we pen test, grouped the way products are actually built. Where a stack changes the penetration test enough to be worth its own page, there is one. This is not a complete list. If what you run is not here we almost certainly still test it, so tell us your stack and we will scope it.
ISO 27001, SOC 2, PCI DSS and Cyber Essentials Plus audits accept manual penetration test evidence. Scan-only evidence is generally insufficient.
BY TECHNOLOGY
Example Technologies We Pen Test
Grouped the way products are actually built. Each line links to the page for that stack, or to the service page that covers it. If yours is not listed, it is still in scope.
JavaScript, TypeScript, React, Angular, Vue, Next.js and jQuery
Single page applications and the API behind them, bundle and source map review, client-side authorisation, and the legacy front ends nobody wants to touch.
Java and Spring, .NET and C#, Node.js, Python, PHP, Ruby on Rails, Go
Framework-specific authorisation, serialisation, template and injection paths, tested against the framework own failure modes rather than a generic checklist.
iOS and Swift, Android and Kotlin, React Native and Flutter
Device storage, certificate pinning, jailbreak and root detection, deep links, and the backend the app talks to.
AWS, Azure, Google Cloud, Firebase, Kubernetes, Docker and Terraform
Identity and permission paths, exposed control planes, container escape, secrets handling and network policy.
PostgreSQL, MySQL, SQL Server, Oracle, MongoDB, Redis, Kafka and Elasticsearch
Injection into every query path, tenant separation, and data stores reachable without authentication.
Windows builds, macOS builds, Active Directory, Linux, Nginx, Apache, IIS, firewalls, VPN and Citrix
Attack paths from a foothold to domain control, edge device exposure, and configuration review against CIS benchmarks.
WordPress, Shopify, Magento, Salesforce, SAP, SharePoint, Microsoft 365, single sign-on and Moodle
Permission models, sharing and guest access, plugin and app exposure, and the integrations bolted on around them.
Thick clients, Electron, embedded and IoT, AI and LLM applications, blockchain
Binary protections, local storage and interprocess communication, firmware and radio, prompt injection and agent abuse, smart contract logic.
Anything else you are running
The list is what comes up most often, not a limit. Name it in the quote form and we will tell you honestly whether we have tested it before.
METHODOLOGY
What one of our findings looks like
Written the way a finding appears in our reports. The example below is reconstructed from publicly documented research, with hosts, paths and identifiers redacted. We do not republish client findings, named or anonymised.
Authorisation check missing on an internal API route
- Affected
- A document retrieval route on the customer portal at [redacted], reachable by any account with a valid session.
- What we found
- A low privileged account could read another organisation documents by changing a single numeric identifier. The route confirmed that the session was valid but never checked that the document belonged to the caller. We enumerated five hundred identifiers in under four minutes.
- Why it matters
- Any authenticated customer could read every other customer uploaded documents, including signed contracts and identity evidence, which is a reportable personal data breach under UK GDPR.
- Fix
- Move the ownership check into the data access layer so every query is scoped to the caller, and add a regression test that requests another tenant identifier and expects a refusal.
Reconstructed from public research: the OWASP API Security Top 10, broken object level authorisation, which has been the first entry in that list since 2019.
Stack-Specific 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 application 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 £2,450 for a small, single-scope engagement, agreed up front. Most engagements run £4,900 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
Quote request received
We will reply within one business day with your fixed-price quote from a named CREST assessor.
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or book a 20-min scoping call first
We reply within one business day. Your data stays with us. No newsletter signup.
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 Stack-Specific 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 4 days
Single user role, basic CRUD application, marketing website with auth. Typically 5-day engagement.
Get a fixed quote4 to 6 days
Multi-role SaaS, business application with payment integration. Typically 8-12 day engagement.
Get a fixed quote6 to 9 days
Multi-tenant platform, complex authorisation matrix, integration-heavy applications. 15-20 day engagement.
Get a fixed quoteBY SECTOR
Stack-Specific 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 a Stack-Specific Test
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
Do you test technologies that are not on this list?
Yes. The list is what comes up most often, not a limit. If you are running something unusual, say so in the quote form and we will tell you honestly whether we have tested it before.
Does the technology change the price?
No. Price follows scope: how many applications, how many roles, how much of the estate is in the test. The stack changes which checks we run.
Do you need our source code?
Not for a standard test. A code review is a separate service and some clients combine the two.
Can you test a stack you have not seen before?
We will tell you if that is the case, and we will not learn on your budget. In practice the pattern of flaws repeats across frameworks, and the specific checks come from the framework own documentation and known issue classes.
How do you handle mixed stacks?
Most engagements are mixed. We scope the whole product once, then apply the stack-specific checks to each part.
What if we are mid-migration?
Common. We test both the old and the new path, because the risk usually sits in what is still reachable from the internet.
What is included in the price?
Scoping, testing, the executive summary, the technical report, a walkthrough call and free retests until the finding is closed. One scope, one number, no follow-up invoices.
How fast can you start?
Scope to active testing in 24 hours once the scope is agreed, subject to tester availability in your window.
Are your testers CREST certified?
Yes. EJN Labs is a CREST member company and testing is delivered by CREST-qualified testers. The membership is verifiable on the CREST marketplace.
20+ CREST-accredited testing services in one place
Web, mobile, API, cloud, AI, infrastructure, red team. Pick the test that fits your environment.
Tell us your stack. We will price it in 24 hours.
Name your front end, your back end and where it runs. You will get a fixed scope and a number, not a discovery call.
