Application Security
We test applications the way attackers do, probing auth, business logic, APIs and infrastructure for what automated scans miss.
We test apps, APIs and cloud the way attackers do, finding what automated scans miss.
Find the flaws that matter.
01. Beyond automated findings.
We combine manual investigation with automated analysis to test trust boundaries, authorization controls, application workflows, and attack paths that require context to uncover.
02. Follow the attack path.
We examine how weaknesses interact across users, APIs, application components, and supporting infrastructure to understand what an attacker could realistically access or compromise.
03. Findings engineers can act on.
Get evidence-backed findings, practical remediation guidance, clear severity ratings, and retesting options to help your team prioritize and verify fixes.
One application. Multiple attack paths.
Security weaknesses rarely exist in isolation. We examine the connections between application components, identities, APIs, and infrastructure to identify where individual weaknesses can become meaningful attack paths.
01 · Application layer
Web applications & business logic
- 01Authentication and session handling
- 02Authorization and privilege boundaries
- 03Sensitive workflows and business rules
- 04Input validation and application configuration
02 · API layer
Endpoints & service integrations
- 01REST and GraphQL interfaces
- 02Object-level and function-level access
- 03Token validation and permission enforcement
- 04Data exposure and resource-abuse risks
03 · Identity layer
Users, roles & privileges
- 01Role and permission boundaries
- 02Privilege escalation paths
- 03Service accounts and machine identities
- 04Trust relationships between components
04 · Infrastructure layer
Cloud, containers & deployment
- 01Cloud IAM and resource exposure
- 02Secrets and credential storage
- 03Network access and segmentation
- 04Container and CI/CD configurations
Application security, end to end.
Application testing
Web Application Penetration Testing
Manual and automated testing of web applications, authenticated workflows, and critical business functionality.
- 01Authentication and session management
- 02Broken access control and IDOR
- 03Injection and input validation
- 04Business logic and workflow abuse
- 05Security misconfiguration
- 06Exploitation validation and retesting
Deliverable: Technical findings, risk prioritization, remediation guidance, and an executive summary.
API security
API & Backend Security Testing
Assess REST, GraphQL, and other in-scope APIs for authorization failures, exposed data, and abuse of sensitive operations.
- 01Object- and function-level authorization
- 02Authentication and token handling
- 03Sensitive data exposure
- 04Rate limits and resource exhaustion
- 05Business-flow abuse
- 06API inventory and configuration weaknesses
Deliverable: Reproducible findings mapped to affected endpoints, identities, and potential impact.
Code review
Secure Code & Architecture Review
Inspect source code and application architecture to identify root causes that may be difficult to confirm through black-box testing alone.
- 01Trust boundaries and security assumptions
- 02Authorization and privilege enforcement
- 03Input handling and unsafe operations
- 04Secrets and sensitive data handling
- 05Security-critical design decisions
Deliverable: Code-level evidence, root-cause analysis, and targeted recommendations for corrective fixes.
Cloud & infrastructure
Cloud & Deployment Security
Review the application’s supporting environment for misconfigurations and privilege paths that could undermine application security.
- 01IAM permissions and privilege escalation
- 02Public storage and exposed services
- 03Secrets and credential management
- 04Network boundaries and access policies
- 05Containers and CI/CD security
Deliverable: Prioritized configuration findings and practical hardening recommendations.
From attack surface to verified fixes.
A structured process that adapts to your application's architecture, risk profile, and testing objectives.
Structured against recognized standards.
Featured security reports.
Why clients trust us.
“Vaultline (formerly 0xTeam) provided us with a comprehensive audit that uncovered critical and hidden vulnerabilities. Their turnaround was fast, and communication was seamless. The team was highly professional and technically sound. We felt secure launching post-audit.”
Playarts Ai@playartsdotai“The audit experience with Vaultline (formerly 0xTeam) was exceptional. Their findings were detailed, accurate, and easy to follow. They identified logic bugs others missed. Our smart contracts are now more robust thanks to their efforts.”
DZap@dzap_io“Working with Vaultline (formerly 0xTeam) was smooth from start to finish. Their security insights helped us fix serious issues early. Their report was thorough, and the post-audit call added great clarity. Definitely our go-to team for future audits.”
Funtoken@funtoken_io“We needed a reliable audit before launch, and Vaultline (formerly 0xTeam) delivered. Their approach blended automation and manual review perfectly. The team was responsive, skilled, and security-focused. We gained major trust from users post-audit.”
AMGI Studios@amgistudios“We loved how hands-on Vaultline (formerly 0xTeam) was during our audit. They didn't just find issues, they educated us too. The report was actionable, clear, and helped our developers level up. Our product is now safer and play-ready.”
Elevate FinancePenetration testing questions.
01What is application penetration testing?
Application penetration testing is an authorized simulated attack on your web app, API or cloud setup. Vaultline testers probe authentication, access control, business logic and infrastructure the way a real attacker would, and prove which weaknesses are exploitable.
02How is a pentest different from a vulnerability scan?
A scanner flags known patterns automatically. A pentest adds manual testing of workflows, permissions and chained attack paths, which is where most serious issues such as broken access control and logic flaws are found.
03What do you test?
Web applications, REST and GraphQL APIs, source code and architecture, and the cloud and deployment environment behind them, including IAM, secrets, containers and CI/CD.
04Which standards do you test against?
Testing is structured against OWASP Top 10:2025, OWASP API Security Top 10:2023, OWASP ASVS 5.0 and the OWASP Web Security Testing Guide, selected to fit your application's scope and risk.
05Do you retest after we fix the issues?
Yes. Retesting of agreed fixes is part of the engagement, so you get confirmation that each finding is resolved.
06How do I start a penetration test?
Send your scope through the contact form or book a call. We confirm the scope, rules of engagement and timeline on a short consultation, then share a quote.
Know where your application stands.
Get an evidence-based assessment of your application’s weaknesses, their potential impact, and the fixes that should come first.