Hi, I'm Ehtesham. I break modern applications before attackers do.
I find real, exploitable vulnerabilities in SaaS products, APIs and AI driven applications. Manual testing, business logic first, impact proven.
I started reporting bugs on public programs in 2018, while I was still learning how real systems break rather than how they are drawn on a diagram. By 2021 it had become the thing I did most seriously, and it is where The Hidden Finds came from. I founded it to do this work under contract, with the depth a good bounty hunter brings and the structure a business actually needs.
Along the way I realized the vulnerabilities that matter are rarely about finding a bug from a checklist. They are about understanding how a system is supposed to work, and then seeing where that logic quietly breaks under someone who is not playing by the rules. That is why almost everything I do is manual. I use tooling to map a codebase or an attack surface, never to decide what is interesting. That judgment is the work, and it is the part a scanner cannot do.
My focus is SaaS applications and their APIs: authentication and authorization, multi tenant isolation, business logic, GraphQL, and the AI driven features that are now shipping faster than they are being secured. Most of my public writeups sit in exactly these areas, from cross tenant data exposure to chained API flaws that each looked harmless on their own.
Every engagement starts with scope agreed in writing. For code review I take read only access or an archive at a fixed commit. Each finding is reported with clear reproduction steps and the real impact spelled out, not a severity label with nothing behind it, and I stay reachable while your team fixes it. If you want the detail, the penetration testing, source code review and API security testing pages explain how each one runs.
The API that returned every customer's private AI assistant
A single API request returned thousands of other customers' private AI assistant configurations: unpublished assistants, internal prompts, voice settings and proprietary metadata. Missing tenant isolation, real impact at scale.
Read the writeup →
A simple profile update that leaked across tenants
A client controlled relationship field on one profile endpoint led to cross tenant metadata disclosure across multiple organizations.
Read the writeup →
A GraphQL invitation flow that exposed users at scale
A normal invite feature revealed registered accounts, internal identifiers and user metadata through an over detailed API.
Read the writeup →
Chaining two APIs into a PII disclosure
Two endpoints that were each fine on their own, combined into a real data exposure worth a $2,000 bounty.
Read the writeup →
SSRF through a misconfigured Sentry tunnel
A legitimate feature used the way nobody intended, crossing a trust boundary into internal reach.
Read the writeup →The profile above is the person. These are the engagements I run under contract through The Hidden Finds. Each page explains the scope, the process and what the final report gives your team.
Penetration testing →
Manual web and API penetration tests, scoped to your product and driven by how it actually behaves under attack.
Source code review →
Manual review of your codebase, standalone or paired with a test, in Python, JavaScript, TypeScript, PHP, Java and C#.
API security testing →
REST and GraphQL focused testing of your API surface, authorization, object ownership and data exposure.
Vulnerability assessment →
A structured assessment of where your real risk sits, with findings ranked by impact rather than scanner output.
- Financial Times · CORS, arbitrary origin trusted
- LifeSite · brute force, full account takeover
- LifeSite · session not invalidated on password change
- Time and Date · CSRF bypass on email and name
eJPT, Junior Penetration Tester
Additional certifications
Founder and Application Security Researcher
Web Application Penetration Tester
Security Researcher
Let's work together
For a security review, a disclosure, or to talk about an application you want tested properly.