Practice record
700+ security engagements
Manual testing across SaaS products, customer portals, APIs, and customer-facing release cycles.
SaaS VAPT, web app, and API penetration testing
Careful, scoped testing of SaaS applications, customer portals, admin panels, mobile apps, and REST/GraphQL APIs. We align on timing, scope, and non-disruptive methods so your team can review findings with confidence.
Third-party testing with fixed scope, agreed windows, and controlled methods.
Training target
DVNA: 756+ GitHub stars
A public vulnerable application maintained for practitioners learning how real app attack paths behave.
Buyer proof
Sample report available
Engineering teams can inspect reproduction steps, exploit paths, remediation notes, and retest framing before kickoff.
Input Validation & Injection
We start by modeling how attackers probe inputs, then trace how that data moves through parsers, resolvers, and serializers. Appsecco testing validates each boundary with scoped payloads to see where assumptions break without disrupting production traffic.
Example Finding
A search filter accepted raw operators in a GraphQL query, allowing limited record inference beyond the intended query shape. We mapped the exact parsing path and recommended parameterized filters with allowlisted fields.
Authentication & Authorization
We model how attackers move from login to tokens, sessions, and privilege boundaries. Appsecco testing traces each decision point - issuance, storage, refresh, and access checks - to confirm your auth flows enforce identity and tenant isolation as designed.
Example Finding
Refresh tokens were accepted without validating the intended audience, allowing a valid token from one app to access data in another. We documented the exact flow and recommended scoped token audiences with enforced checks.
Business Logic Abuse
We model how a real attacker stitches together legitimate features - reordering steps, skipping gates, and chaining flows that were never designed to connect. Appsecco testing walks each decision path to confirm your product rules hold under out-of-order and edge-case sequences.
Example Finding
An upgrade workflow accepted a step-complete flag before payment confirmation, enabling feature access without charge. We mapped the exact sequence and recommended server-side state validation at each transition.
API Abuse & Protocol Confusion
Attackers look for gaps between API intent and protocol reality - switching verbs, replaying requests, and nudging headers to see what the service actually enforces. Appsecco testing recreates those behaviors with scoped, non-disruptive probes, then traces how your API parses and authorizes each variation.
Example Finding
A sensitive action accepted GET requests alongside POST, which bypassed CSRF protections in a specific route. We documented the parsing path and recommended strict method enforcement with consistent handler validation.
Client-side & JavaScript Risks
Attackers probe the browser runtime because it reveals how data is rendered, stored, and reused. Appsecco testing traces user-controlled input through DOM sinks, template bindings, and storage APIs, then validates CSP, CORS, and content-type handling to confirm the client stays within intended boundaries.
Example Finding
A support note renderer accepted HTML in a preview pane, which flowed into an admin dashboard view and executed as script. We mapped the rendering path and recommended strict sanitization with an allowlist plus CSP hardening.
Enumeration, Rate Limits & Resilience
Attackers map endpoints and automation boundaries before they try to escalate; that behavior is why Appsecco testing pairs route discovery with control validation. We assess hidden routes, GraphQL introspection, and predictable identifiers, then verify rate limits, lockouts, and retry controls so automated probing stays contained.
Example Finding
A password reset endpoint returned different responses for valid and invalid users and lacked per-tenant throttling. We documented the sequence and recommended uniform responses with rate limits keyed by account and IP.
Why teams trust app testing here
Application testing authority is easiest to judge from the artifacts
Strong appsec practices show their work through training targets, clear reporting, and case studies that go beyond checklist language.
AM
Practice lead
Akash Mahajan
Founder & CEO
Akash leads Appsecco's product security testing practice and the public research behind its methods, labs, and reporting standards.
- 10+ years in product security and 700+ security engagements
- Conference speaker at BlackHat, OWASP, and regional security events
- Author of open-source security training, MCP testing resources, and practitioner checklists
Public artifacts and method signals
The public materials here are less about slogans and more about whether the practice can teach, document, and explain the same attack paths it tests in client systems.
DVNA
756+ GitHub starsA deliberately vulnerable Node.js application used by practitioners to learn how real application flaws behave under manual testing.
Sample report
Public report artifactShows how reproduction steps, exploit paths, and remediation guidance are written for engineering review.
Methodology
Testing modelThe published approach for moving from attacker behavior to evidence, prioritization, and fix verification.
Application references
These routes show what the practice looks like in real product environments, especially around business logic, authorization, and tenant boundaries.
B2B SaaS case study
Business logic and authA closer look at how manual testing surfaced chained authorization and workflow issues beyond automation.
E-commerce SaaS case study
Tenant isolation and APIsCross-tenant data exposure, GraphQL surface, and access control evidence from a multi-tenant platform review.
Reports & deliverables
Review packageWhat product teams receive when they need findings that engineering, security, and buyers can all use.
What clients say about application testing
Appsecco has delivered great results in the security assessments we’ve engaged them for. What stands out is their effort to deeply understand the application’s design and intended purpose, which helps them identify the right risks and provide meaningful, context-aware findings.
Shruthi R Patil
Manager, Product Security, Infoblox
AppSecco was the perfect partner for ensuring our application security was thoroughly validated and audited. Their team conducted SAST, DAST, penetration testing, and provided a comprehensive Secure SDLC report, helping us meet critical compliance requirements.
Amritha Dilip
Founder, CTO, GetBlue.ai
Reference-ready next step
Need an application-testing reference?
We can start from the material your team needs first: a report sample, a SaaS case study, or the app-testing methodology.
Start with the artifact that best matches the review your team needs to run.
Request scoped reviewApps & APIs FAQ
What exactly is in scope for Apps & APIs testing?
We align on specific apps, environments, and endpoints before testing starts. Scope includes SaaS web apps, customer portals, admin panels, mobile front-ends, and the APIs they call, with routes, roles, and data types documented so your team can review coverage clearly.
How do you show evidence for each finding?
Each issue includes a reproducible path, affected endpoints or screens, and the exact condition that failed. We keep steps concise so engineering, security, and audit reviewers can validate the risk and the fix.
What do we receive at the end of the engagement?
You receive a VAPT-style report tailored for product teams: findings with remediation guidance, severity rationale, scope notes, and an executive summary. We also provide a walkthrough to confirm interpretation and answer questions.
Do you provide a VAPT certificate?
We provide a detailed VAPT or penetration testing report, scope statement, retest notes when applicable, and attestation-style documentation on request for customer security reviews, audits, or procurement. We do not issue a generic certificate that implies systems are permanently secure; the documentation states what was tested, when, and what evidence was observed.
Can you test production systems safely?
When production testing is required, we coordinate windows, rate limits, and non-disruptive techniques with your team. If a staging environment is preferred, we mirror the same scope and confirm any production-only behaviors separately.
Do you retest fixes or help validate remediation?
Yes. We can retest confirmed fixes and document closure with the same evidence-driven format, so internal reviews have a clear before-and-after record.
Explore application attack paths
Related app and API security services and resources
Continue from app security concepts into API testing scope, business logic abuse, pentest planning, and application attack research.
Glossary
API Security Testing
Testing methodology for API authorization, data exposure, injection, rate limits, and OWASP API risks.
Glossary
Business Logic Testing
Manual testing for workflow abuse, authorization gaps, pricing flaws, privilege misuse, and edge-case exploitation.
Glossary
Penetration Testing
How structured security testing identifies exploitable weaknesses across application, API, and infrastructure surfaces.
Guide
First Pentest Guide
A practical guide for preparing scope, access, timelines, and expectations before a first product security test.
Guide
Pentest RFP Template
A buyer-focused template for defining product security testing scope, expectations, and vendor comparison criteria.
Blog
Hacking Apps Using NoSQL Injection
A walkthrough of how NoSQL injection changes query behavior and exposes application data.
Blog
Server Side Request Forgery via HTML Injection in PDF Download
A real-world application testing story chaining PDF HTML injection into SSRF against AWS infrastructure.
Blog
Microservices Authorization Using Open Policy Agent and Traefik
Authorization patterns for API gateway enforcement in microservice architectures.
Blog
Exploiting weak configurations in Amazon Cognito in AWS
How to detect and exploit misconfigured Amazon Cognito identity pools, covering federated identity abuse and techniques found during real web and mobile application assessments.
Review the scope together. No obligation to proceed.
We can walk through your apps and APIs, confirm testing windows, and share a fixed quote if useful.
No sales pressure
Fixed scope and pricing
You choose the pace