What Is Grey Box Penetration Testing
- Manual, real-world attack simulation
- Authenticated and unauthenticated testing
- Multiple user roles and privilege levels
- Business logic and authorization testing
- Clear technical findings and remediation guidance
- Remediation testing included
Maximizing Value of SOC 2 Penetration Testing
User Role/ Authenticated Testing
We perform a thorough penetration test of your web application across its functionality and user roles using OWASP ASVS and OWASP Top 10. For applications with AI or agentic functionality, we assess relevant AI security risks and attack paths.
Mobile
If your web app has a mobile side, it may be valuable to test the interaction between them. Our testing evaluates communication security using our methodology based on OWASP ASVS, OSSTMM, and PTES.
API
API testing is often done in conjunction with web penetration tests. APIs can be a weak vector into any organization that doesn’t check its security. We leverage OWASP’s research to find the most common attack vectors.
Cloud
Your web application sits on top of infrastructure, and even it is in the cloud, it is important to test. Our experts have deep experience in all major cloud providers and follow their terms of service to ensure no interruption: AWS, GCP, Azure, and Oracle. This gives you the opportunity to dive deep into your application’s infrastructure.
Code Review
A code review is the best way to check for vulnerabilities before they are seen by the public. It can also catch business logic flaws and other problems that are not readily apparent in the compiled application. We utilize OWASP’s Code Review Guide and Google’s Standard of Code Review
Internal & External Network Testing
We assess both internal and external network environments to identify weaknesses that could expose critical systems and sensitive data. External testing evaluates your internet-facing attack surface, while internal testing simulates threats from within the network or from an attacker who has gained an initial foothold.
Assets That Could Be Tested
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Web Applications
Test authenticated and unauthenticated functionality across different user roles, permissions, workflows, and business logic. -
APIs
Assess APIs using authorized credentials, API keys, tokens, documentation, and defined user roles to identify authorization, authentication, data exposure, injection, and business logic vulnerabilities. -
Mobile Applications
Assess iOS and Android applications, their backend services, authentication flows, API communication, local storage, session handling, and application-specific functionality. -
Internal Networks
Simulate an attacker or compromised user who has gained access to the internal environment. Testing can evaluate privilege escalation, lateral movement, segmentation, exposed services, identity infrastructure, and access to sensitive systems. -
External Networks
Evaluate internet-facing infrastructure while using limited information or credentials where appropriate to identify attack paths beyond those available to a completely unauthenticated attacker. -
Cloud Environments
Assess cloud infrastructure using authorized access to evaluate identity and access management, permissions, configuration weaknesses, exposed resources, privilege escalation paths, and potential access to sensitive information.
How CYBRI Penetration Testing Works
CYBRI Pen Tests are on-demand hacker-powered penetration tests performed by one or two Red Team members. You pay a fixed price for your test and we do the rest. You can always increase the frequency.
Discovery
We will collect the needed information from you and your team to make sure that the right assets are being tested and the right team is assigned.
RED TEAM IN ACTION
CYBRI Red Team members will start testing your infrastructure and will ensure coverage of OWASP top 10 vulnerabilities. They will utilize their own techniques to ensure the highest levels and standards of testing.
Reporting
Collaboration
After each finding is verified by our Red Team members, they get submitted into your dashboard and report. Upon completion of each test, you will have a clear report that can be shared with executive and technical members as well as your clients.
Retest
Once the findings have been remediated by your team and the time is right to retest your technology, you can easily do so by scheduling a new test with us or by purchasing an annual package of multiple tests.
Repeat
Improve risk posture and decrease the liability of your organization. Asses the cybersecurity and risk of your organization on an annual engagement basis with the top five percent of the nation’s cybersecurity talent, the CYBRI Red Team.
We spend a week or more preparing before we execute. We will collect the needed information from you and your team to make sure that the right assets are being tested and the right team is assigned.
CYBRI Red Team members will start testing your infrastructure and will ensure coverage of OWASP top 10 vulnerabilities. They will utilize their own techniques to ensure the highest levels and standards of testing.
Communicate with CYBRI Red Team members about your vulnerabilities and assign the vulnerabilities for remediation to your team members; all directly in our platform. Our platform has a clear collaboration functionality to help your team with remediation of the findings.
After each finding is verified by our Red Team members, they get submitted into your dashboard and report. Upon completion of each test, you will have a clear report that can be shared with executive and technical members as well as your clients.
Once the findings have been remediated by your team and the time is right to retest your technology, you can easily do so by scheduling a new test with us or by purchasing an annual package of multiple tests.
Improve risk posture and decrease the liability of your organization. Asses the cybersecurity and risk of your organization on an annual engagement basis with the top five percent of the nation’s cybersecurity talent, the CYBRI Red Team.
How Grey Box Pentest Works
1. Scope The Engagement:
2. Provide Test Access:
- Test accounts for relevant user roles
- Application URLs and IP addresses
- API credentials or authentication tokens
- API documentation
- VPN or internal network access
- Cloud test accounts or defined permissions
- Relevant architecture or environment information
- Allowlisting requirements
3. Manual Penetration Test:
4. Findings And Remediation:
5. Remediation Testing:
How Long Does a Grey Box Pentest Take
Most grey box penetration tests can be completed within 5–10 business days, depending on the size and complexity of the environment. Smaller applications or environments may require less time, while engagements involving multiple applications, APIs, user roles, networks, or cloud environments may require additional testing time.
Your expected testing duration is defined during scoping before the engagement begins.
How Much Does Grey Box Penetration Testing Cost
- Number and type of assets
- Application size and complexity
- Number of authenticated user roles
- Number of APIs and endpoints
- Internal or external network size
- Cloud environment complexity
- Mobile platforms
- Engagement objectives and testing depth
Grey Box vs. Black Box vs. White Box Penetration Testing
Approach | Black Box | Grey Box | White Box |
Prior Knowledge | Minimal | Partial | Extensive |
Credentials Provided | No | Yes, where required | Yes |
Multiple User Roles | Usually No | Usually Yes | Yes |
Internal Documentation | Minimal / None | Relevant Information | Extensive |
Source Code Access | No | Usually No | Yes |
Unauthenticated Testing | Yes | Yes | Yes |
Authenticated Testing | No | Yes | Yes |
Authorization Testing | Limited | Extensive | Extensive |
Business Logic Testing | Limited | Extensive | Extensive |
Attacker Perspective | External Attacker | External + compromised/legitimate user | Full-access assessment |
Testing Efficiency | Lower | High | High |
Benefits of Grey Box Penetration Test
Grey box testing provides a balance between real-world attacker simulation and deep security coverage.
9 Years Dedicated To Penetration Testing
Since 2017, CYBRI has been dedicated to penetration testing, helping businesses of all sizes, from startups to multinational enterprises, identify and eliminate security vulnerabilities. Our sole focus is pentesting and vulnerability scanning, ensuring deep expertise and rigorous assessments without distractions.
What Our Customers Have to Say
What to Expect During a Grey Box Penetration Test
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Manual-First Testing
Our security professionals manually investigate your environment rather than relying exclusively on automated vulnerability scanners. Automated tools may support the engagement, but findings are manually validated and explored to understand their real security impact. -
Testing Across User Roles
Where multiple roles exist, we evaluate whether permissions and authorization boundaries are properly enforced. This helps identify vulnerabilities where one user may be able to access information, functionality, or administrative actions intended for another role. -
Real-World Attack Paths
Individual vulnerabilities do not always represent the full risk. Our testers investigate whether weaknesses can be combined to create more significant attack paths, including unauthorized access, privilege escalation, sensitive data exposure, or compromise of additional systems. -
Communication During Testing
You are not left waiting until the end of the engagement to learn about serious security issues. Critical vulnerabilities can be communicated to your team during testing so remediation can begin immediately. -
Controlled Testing
Testing is performed only against the agreed scope and according to the engagement rules established before testing begins. We do not perform destructive actions, intentionally disrupt production systems, modify critical data, or expand testing outside the approved scope without your authorization. -
Clear Reporting
At the end of the engagement, you receive a penetration testing report designed for both technical and business stakeholders. The report includes:
- Executive summary
- Scope and methodology
- Risk-rated findings
- Affected assets
- Technical evidence
- Business impact
- Reproduction details
- Remediation guidance
- Compliance Mapping
Compliance Testing
Remediation Testing and Support
9 Years Dedicated To Penetration Testing
Since 2017, CYBRI has been dedicated to penetration testing, helping businesses of all sizes, from startups to multinational enterprises, identify and eliminate security vulnerabilities. Our sole focus is pentesting and vulnerability scanning, ensuring deep expertise and rigorous assessments without distractions.
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