Independent security researcher and developer — Baden-Württemberg, Germany.
I build complete systems, from backend and web to Android and iOS apps, devices and servers, and I examine widely used software for vulnerabilities that I report through coordinated disclosure.
- 🔎 Security research — coordinated vulnerability disclosure through national CERTs (CERT/CC · BSI CERT-Bund · ANSSI/CERT-FR). Focus on privacy and messenger security.
- 🛠️ Building — Go · Python · TypeScript · Swift/iOS · SQLite/WebAssembly · self-hosted infrastructure.
- 🌐 Case studies, projects and CV — hoseiny.de
Published disclosures
| Case | Finding | Links |
|---|---|---|
| imo Messenger | Zero-click IP leak via client-side link preview (500M+ users) | write-up · repo |
Projects
| Project | What it is | Links |
|---|---|---|
| Digitale PSM | Free, open-source web app for plant-protection records. SQLite runs as WebAssembly in the browser, the data stays a file with the user, works offline. | write-up · app · repo |
| BVL data pipeline | Fetches the German plant-protection approval database every two days and publishes it as SQLite. | repo · statistics |
Certifications — Cisco CCST Cybersecurity · Cisco CCST Networking · CompTIA Network+ · CompTIA A+ · CompTIA IT Operations Specialist · verify on Credly
Contact — hoseiny.de · abbas@hoseiny.de · LinkedIn