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Web Application Penetration Testing

Arcanum's Web Application Penetration Testing service stands as one of our premier offerings, delivering world-class security assessments designed to identify and mitigate vulnerabilities before they can be exploited. We safeguard every layer of your modern web estate, from classic LAMP stacks to today's cloud-native, JavaScript-heavy applications.

TBHM
the web methodology the industry trains on
F500
vast majority personally tested
GDPR · PCI · SOC2
compliance-ready reporting
Web Application Penetration Testing
The Arcanum Difference

Elite expertise & a battle-tested approach.

Our testers run advanced red team engagements, penetration tests, and top-tier bug bounty programs for Fortune 500 companies. We bring that adversary mindset to every layer of your web stack, from classic server-side flaws to modern client-side attack surface.

01

Fortune 500 Track Record

Led by Jason Haddix, our service combines rigorous structured assessments with real-world bug bounty hunting. Jason has personally tested web application technologies for the vast majority of Fortune 500 companies.

02

Industry-Leading, Recognized Methodology

Jason's methodology is highly regarded and sought-after across the cybersecurity industry. Engineers from premier, world-class consultancies globally attend Arcanum's specialized training courses (like the renowned "Bug Hunter's Methodology") to learn the very techniques we apply to your applications.

03

Bug Bounty DNA

Our testers cut their teeth on live-fire, high-stakes bug bounty programs where only the fastest, most creative, and persistent researchers succeed. We think like real-world adversaries, not just checklist auditors, finding critical breaches others miss.

Arcanum specialty
Methodology

A modern methodology beyond the OWASP Top 10.

Web application security has transformed significantly. While critical server-side vulnerabilities (like SQLi, SSTI, CMDI, IDOR, etc) still pose immediate threats, they are often obscured, hidden behind blind spots, or require complex exploit chains. Furthermore, today's environment frequently presents sophisticated challenges:

Sophisticated Challenges We Hunt

// beyond the checklist
  • Intricate client-side vulnerabilities (DOM XSS, prototype pollution, JS Gadgets).
  • Sophisticated misconfigurations demanding deep framework knowledge.
  • Emerging flaws in modern architectures (SPAs, GraphQL, service-workers, micro-frontends).

Content Discovery 2.0

// 05 techniques

A cornerstone taught in our methodology course, employing techniques often overlooked:

  • Historical artifact mining and discovery.
  • Deep JavaScript analysis and property graphing.
  • 403/404 error page and access control misconfiguration testing/pivots.
  • Intelligent, auth-gated spidering and forced browse strategies.
  • Parameter discovery and manipulation.

Client-Side Analysis

// 03 focus areas

Rigorous testing of modern client logic:

  • DOM-based XSS & CSP bypasses.
  • Prototype pollution & supply-chain injections (e.g., insecure third-party scripts).
  • Framework-specific attack surfaces (Next.js, Angular, React, Vue, etc.).

Hybrid Fuzzing & Payload Engineering

// 03 techniques

Unlike many consultancies, we extensively utilize:

  • Payload-based and fault-injection fuzzing tailored to your application.
  • Target-aware fault injection for APIs, web-sockets, and cloud functions.
  • Differential analysis to surface race conditions, desyncs, and logic vulnerabilities.
SRV

Server-Side & Infrastructure Hardening

Identifying classic injection classes and misconfigurations in containers, serverless runtimes, edge gateways, and API integrations.

BENCH

Specialist Bench On Demand

Need expertise in niche tech like WebAssembly, Shopify Liquid, GraphQL federation, ServiceNow, Salesforce Apex, or IoT Hybrid testing? We leverage our unique, vetted network to bring in specialized expertise unavailable through traditional consultancies.

Partner with Arcanum

Transform risk into resilience.

Choose Arcanum for web application penetration testing that leverages a uniquely effective, battle-tested methodology and insights gained from the highest levels of cybersecurity research and real-world bug hunting. We provide proven ROI through faster remediation cycles and measurable risk reduction, ensuring compliance (GDPR, PCI DSS, SOC2) while hardening you against zero-day threats.

What You Get

Deliverables that drive real remediation.

Every engagement ends with more than a PDF: you get the evidence, the context, and the support to actually fix what we find.

01

Detailed Technical Report

Every finding documented with clear reproduction steps, real-world impact, and the evidence to back it.

02

Executive Summary

Risk translated into business terms your leadership and board can act on.

03

Prioritized Remediation

Practical, ranked fixes tied to the real attack paths we walked, not a raw scanner dump.

04

Live Findings Debrief

A working session where we walk your team through the results and answer every question.

05

Complimentary Retest

Once you've remediated, we re-test the findings to confirm the fixes actually hold.

06

Knowledge Transfer

You learn how we found what we found, so your team gets stronger with every engagement.

Ready to see how deep modern web testing can go?

Let's secure your application surface before someone else does. Contact us today to schedule an assessment and fortify your digital assets.

Scope

Choosing the right engagement.

Our three external-facing services overlap but aren't interchangeable. Here's exactly what each covers, so you can scope the one you actually need.

External Network Pentest Cyber Red Teaming Web Application PentestYou are here
Reconnaissance
CVE & misconfiguration analysisinfra · cloud · web
Phishing & social engineering
Dependency confusion & hijacking
Leaked-credential analysisdark-web / breach dataExposure onlynot validatedStuffed & validated
Web-application testingUnauthenticatedUnauthenticatedcreds only to reach a goal *Full credentialedfull stack

* On a red team, web applications are only credential-tested when dark-web-sourced credentials are used to reach an agreed objective.