Website & Web Application Penetration Testing

What is a website penetration test?

A website penetration test is a controlled, authorized attack on your website and the web application behind it, carried out the way a skilled adversary would approach it. The goal is not to list theoretical issues — it is to find the weaknesses a real attacker could reach and to demonstrate what they could actually do with them.

That distinction is the whole point. A vulnerability scanner tells you a page might be injectable. A website pentest confirms it, chains it with the next flaw, and shows you the impact: the record it exposed, the account it took over, the data it reached. BackDoor delivers that proof for every confirmed finding, so your team spends remediation time on real risk instead of chasing scanner noise.

Website penetration testing and web application penetration testing describe the same work here: a deep, exploit-driven assessment of everything your site does — its pages, forms, authentication, sessions, business logic, and APIs.

What we test: scope and attack surface

A modern website is far more than its pages. BackDoor assesses the full application attack surface, including:

• Authentication and session management. Login flows, password reset, multi-factor gaps, session fixation, and token handling.
• Access control. Broken access control, insecure direct object references (IDOR), privilege escalation between user roles.
• Input handling and injection. SQL injection, cross-site scripting (stored and reflected), command injection, cross-site request forgery (CSRF), and server-side request forgery (SSRF).
• Business logic. The abuse cases a scanner never understands: coupon and pricing manipulation, workflow bypasses, race conditions on critical actions.
• APIs. The REST and GraphQL endpoints behind your front end, where authorization is often thinner than the UI suggests.
• Configuration and exposure. Misconfigurations, verbose errors, exposed secrets, insecure file uploads, and outdated components with known CVEs.

We start from the OWASP Top 10 as a floor, not a ceiling. Real coverage means testing past the checklist into the logic that is unique to your application.

• What you providefrom you

  One account per role

  A regular user, an admin, and a second tenant if your product is multi-tenant. Two accounts at the same level are often more useful than one — that pair is what proves your data separation holds.

  • Regular user
  • Admin
  • Second tenant
  • Second peer account
• What we do with itfrom us

  Authenticate, map, attack

  The agents log in, map the functionality that only appears after login, and attack it the way someone with a valid account would.

  • Identifier swapping
  • Session replay
  • Out-of-order workflow
  • Logout that doesn't

Common website vulnerabilities we find

Across the sites we test, a recurring set of weaknesses shows up again and again. On a typical web application, BackDoor uncovers:

• SQL injection that exposes or alters database records.
• Cross-site scripting (XSS) — stored and reflected — that hijacks user sessions.
• Broken access control and IDOR, where changing an identifier reaches another customer's data.
• Broken authentication — weak resets, credential stuffing exposure, missing rate limiting.
• Cross-site request forgery (CSRF) on state-changing actions.
• Server-side request forgery (SSRF) reaching internal services from the web tier.
• Security misconfiguration and exposed secrets in responses, headers, or repos.
• Outdated components with public, exploitable CVEs that scanners flag but never prove.

Every one of these is confirmed with a working proof of concept, so you know it is real, you know how severe it is, and you know exactly what to fix first.

How BackDoor runs your website pentest

BackDoor pairs a swarm of AI agents with a proven offensive methodology. The agents work in parallel — 127+ of them, running 300+ attack scenarios — so a full website test that traditionally takes weeks is completed in about five hours, without thinning the depth of coverage.

1. 01

   Scoping and authorization

   You define the target application and rules of engagement. We confirm scope and ownership before any traffic is sent.

2. 02

   Reconnaissance and mapping

   The agents crawl and map the application — pages, parameters, endpoints, authentication flows, and hidden functionality.

3. 03

   AI-driven testing and exploitation

   127+ agents probe 300+ scenarios in parallel, chaining findings and reasoning through business logic the way a human operator would, but at machine speed.

4. 04

   Proof-of-concept validation and CVSS ranking

   Every confirmed vulnerability is reproduced with a working exploit and scored by CVSS. You receive the full, prioritized report in about five hours — and we retain none of your data afterward.

The methodology is grounded in the recognized frameworks — the OWASP Web Security Testing Guide, PTES, and NIST SP 800-115 — so coverage is consistent and defensible. Testing runs in a production-safe mode: no load-based attacks, an agreed testing window, and the ability to stop at any moment.

What you get: deliverables and sample report

You do not get a raw scanner export. You get a report your team can act on the same day:

• CVSS-ranked findings, ordered by real-world risk.
• A working proof of concept for every confirmed vulnerability.
• Clear remediation guidance written for the developers who will fix it.
• A retest to confirm the fixes held.
• Two report versions — an executive summary for leadership and technical detail for engineers.
• Zero data retention — we delete your data after the engagement, by design.

Types of application testing we cover

A website pentest is one part of application security. BackDoor covers your web application and its APIs in depth. If you need the whole internet-facing perimeter tested — mail and DNS servers, VPNs, exposed services, and forgotten subdomains — that is the job of an external penetration test, which we also provide.

Compliance

Regular, independent website penetration testing supports the frameworks your customers and auditors ask about: PCI DSS, SOC 2, ISO 27001, HIPAA, and GDPR. On request, BackDoor maps each finding to the relevant control, so the report doubles as audit-ready evidence rather than a separate exercise.

Who needs a website penetration test?

If your business runs on a website or web application, you have an attack surface worth proving. Website penetration testing matters most for:

• SaaS and technology companies, whose product and customer data live in the app.
• E-commerce and payments, where downtime and data loss hit revenue directly.
• Fintech and banking, under PCI DSS and constant, targeted attack.
• Healthcare and any team handling sensitive records, where a breach carries regulatory weight.

Test before a major release, after significant changes to the application, and ahead of any compliance audit or cyber-insurance renewal that requires independent testing.

Why BackDoor

A website pentest means letting a partner attack the application your business runs on. Here is why teams choose BackDoor:

Pricing

Transparent, fixed-scope pricing — you know the cost before a long sales cycle. Not sure what your scope needs? Request a quote and we will size it with you based on the number of applications and their complexity.