// application security

Broken Access Control & IDOR Testing

Broken access control is the number-one risk in the OWASP Top 10 and the most common serious flaw we find in Cyprus applications. This is dedicated authorization testing: we create multiple users and roles and systematically try to read, write and escalate beyond our permissions — a focused part of a full web application penetration test.

IDOR and access-control flaws are invisible to scanners because the request looks perfectly valid — only the authorization decision is wrong. We build a matrix of every role against every function and object, then test each cell by hand for horizontal and vertical bypass.

Broken Access Control & IDOR Testing in Cyprus — CyprusPentest test coverage and attack surface
Broken Access Control & IDOR Testing: manual, exploit-led coverage for Limassol & island-wide Cyprus businesses.

Why it matters

One IDOR can expose every customer record at once — an instant, silent GDPR breach. Because the flaw is a missing check rather than a malformed input, it is found only by deliberate, role-aware testing, never by a scan.

What we test

  • Horizontal access control (cross-user IDOR)
  • Vertical access control (privilege escalation)
  • Object-level authorization on every reference
  • Function-level authorization and hidden endpoints
  • Forced browsing and parameter tampering
  • Mass assignment and property-level authorization

Common vulnerabilities we uncover

  • IDOR exposing other users' records
  • Privilege escalation to admin
  • Unauthorised access to hidden functions
  • Mass assignment overwriting protected fields
  • Tenant or account boundary bypass
  • Sensitive data access via reference tampering

How we run your engagement

  1. Kick-off & scoping. A short call to agree goals, in-scope assets and rules of engagement, so your broken access control & idor testing is safe, authorised and aimed at your real business risk.
  2. Mapping & discovery. Before touching anything we map the full attack surface in scope, so nothing exploitable slips through.
  3. Hands-on testing. Cyprus-based specialists exploit and chain weaknesses manually — the flaws scanners walk straight past — to show genuine impact.
  4. Reporting. Each issue is verified, CVSS-rated and documented with a step-by-step reproduction and a practical fix your team can apply.
  5. Free retest. Once you have remediated, we re-test at no extra cost to confirm the attack path is truly closed.

Tools & techniques

We provision at least two accounts per role and replay each one's requests in another's session and context, walking object references, hidden endpoints and mass-assignment paths. Every confirmed bypass is documented as a concrete cross-user or privilege-escalation proof.

For multi-tenant products this connects to our SaaS penetration testing, and for the API layer, our API penetration testing — all within full web application penetration testing.

When you need this engagement

  • Your app has multiple roles or user-owned data
  • You expose identifiers in URLs or API calls
  • You run a multi-tenant or account-based model
  • You have added roles, sharing or permissions
  • You want proof your authorization actually holds

What you receive

  • Confirmed access-control findings with evidence
  • Role-by-object test matrix results
  • Reproduction steps per finding
  • Server-side authorization remediation guidance
  • Attestation letter where required
  • Complimentary retest after fixes

Your deliverables

When your broken access control & idor testing wraps up, you receive a clear, audit-ready report plus a walkthrough call with your team. Inside you will find:

  • A concise executive summary that management and the board can act on
  • Every technical finding with a reproducible, copy-paste proof of concept
  • CVSS v3.1 ratings and plain-language business impact for each issue
  • Practical, prioritised remediation your developers can implement straight away
  • A free retest and updated finding status once fixes are in place
  • A signed attestation letter for clients, auditors, GDPR, NIS2 and ISO 27001

Standards & frameworks

OWASP Top 10 A01: Broken Access Control OWASP WSTG CWE-639, CWE-284, CWE-285 NIST SP 800-115

What you gain

By the end of your broken access control & idor testing, you will know exactly which weaknesses a real attacker could exploit, what it would cost your business, and the precise order in which to fix them — backed by evidence, not a scanner’s guesswork. Cyprus firms use our findings to close critical gaps, satisfy client and regulator security questionnaires, and demonstrate due diligence for GDPR and NIS2. With a free retest included, you also get documented proof the issues are resolved.

Working with us

Every broken access control & idor testing begins with a short, no-obligation scoping call to understand your goals, environment and constraints, followed by a fixed-price proposal. Most work is delivered remotely, and because we are based in Cyprus we work in your timezone with on-site visits across Limassol, Nicosia and island-wide where it helps. We keep you updated throughout and flag any critical finding immediately rather than waiting for the report. Everything is covered by a signed NDA and safe, non-disruptive testing that protects your production systems. You receive your report, a walkthrough and a complimentary retest once fixes land. Engagements are typically booked one to three weeks ahead, and urgent testing can often be arranged — just email hi@cypruspentest.com.

Why Cyprus businesses choose CyprusPentest

Your broken access control & idor testing is run by senior offensive-security specialists who test the way genuine attackers do — manually, creatively and focused on proving real impact. What sets us apart:

  • Based in Cyprus — local, in your timezone, with on-site coverage across Limassol and Nicosia.
  • Manual, exploit-led testing that chains vulnerabilities the way an attacker would, well beyond automated scanners.
  • Reproducible proof for every finding, with copy-paste steps your team can independently verify.
  • Compliance-ready reporting that supports GDPR, NIS2, ISO 27001 and CySEC expectations.
  • A free retest so you have documented evidence your fixes actually hold.
  • Fixed-price and responsive, with a named point of contact from scoping through to retest.

Explore related services

Broken Access Control & IDOR Testing pairs well with our other Cyprus penetration testing services for fuller coverage. You may also want:

  • Web Application Penetration Testing — Web application penetration testing in Cyprus. Manual, exploit-led testing for Limassol & island-wide businesses — OWASP-aligned,…
  • SaaS Penetration Testing — SaaS penetration testing for Limassol and island-wide businesses — multi-tenant isolation, RBAC and API security tested…
  • API Penetration Testing — API penetration testing in Cyprus for REST & GraphQL. OWASP API Top 10, BOLA/BFLA and token…

How much does Broken Access Control & IDOR Testing cost?

Every broken access control & idor testing in Cyprus is scoped and priced individually, so you pay only for the coverage you need — with no hidden extras. After a short, no-obligation scoping call we send a fixed-price quote, usually within one business day, with clear deliverables, a firm timeline and a complimentary retest included. The price depends on the size and complexity of your environment, so you always know the cost up front before any work begins.

Get a fixed-price quote

Frequently asked questions

What is IDOR?
Insecure Direct Object Reference — when changing an identifier lets you access another user's data because the server does not check ownership.
How many accounts do you need?
At least two per role, so we can prove or disprove access control between users.
Is this the same as a full pentest?
It is a focused component; access control is always tested within a full web application penetration test too.
Do you retest after fixes?
Yes, a complimentary retest is included.
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Tell us about your systems and goals. A Cyprus-based specialist will reply with scope and a fixed-price quote, usually within one business day.

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