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Soufiane E.SE

Soufiane E.

Vulnerability Researcher & Developer

€555/day
3 projects
Waterloo, BE
3-7 years

Average response time: 1 hour

About Soufiane

Visit: selmelc.com for more information

I'm a software and cybersecurity enthusiast ! I write software for all types of applications and also provide vulnerability research to help companies secure their software. I have worked with the following companies and software developers to help secure their software : MongoDB, Monero, Curl, Fireblocks, Amazon, Hackerone. Among other which prefer to not be named.

When it comes to development I have a particular interest for low-level programming (C and Assembly based projects) either for userland or kernel space software. But I'm very flexible and can adapt technologies or languages.

I'm also a builder and enjoy creating innovating modern solutions through SaaS products mainly developed with FastAPI + SQLModel and React.

CTF player with a focus on reverse engineering and exploitation. Multi-finalist in national competition and active on most of the well known CTF platforms.

Published research (updated list on selmelc.com)
▪ CVE-2025-4373 : Integer overflow in glib leading to buffer under-write.
▪ CVE-2025-0755 : High impact buffer overflow in libbson affecting MongoDB Server.
▪ CVE-2024-6381 : Integer overflow to buffer overflow in MongoDB’s libbson.
▪ CVE-2024-6383 : Heap buffer overflow in MongoDB’s libbson.
▪ CVE-2023-0437 : Integer overflow leading to infinite loop of the MongoDB’s C driver.
▪ CVE-2023-38039: HTTP header allocation DoS in Curl.
▪ CVE-2023-32001: TOCTOU race condition in Curl.
▪ Monero Wallet RPC vulnerability : Discovered a credential leaking vulnerability in Monero’s official wallet software.
▪ Reported and patched multiple none publicly disclosed vulnerability for various clients
▪ Reported multiple vulnerabilities in the website of an educational Belgian company to the
Belgian CERT (CCB), for a preauthentification account takeover + IDOR leading to a
complete break of all the clients confidentiality + a bypass on the content’s paywalls.

  • French

    Native or bilingual

  • English

    Native or bilingual

  • Dutch

    Basic

  • Greek

    Basic

Remote only
Primarily works remotely

Experience

  • SELMELC Cybersecurity
    Vulnerability researcher (Self-Employed)
    June 2023 - Today (3 years)
    Belgium
    • Vulnerability research focused on open-source software.
    • Non-confidential clients: MongoDB, Monero, Curl, Fireblocks, Amazon, Hackerone, ZDI.
    • Confidential clients sectors: banks, fintech, governments, EDR and cybersecurity solution providers, firmware for medical devices, fortune 500 companies.

    Cybersecurity Vulnerability Management
  • Census
    Application Security Engineer (Freelance)
    January 2024 - Today (2 years and 5 months)
    Greece
    • Application security.
    • Consulting for various types of clients and assets.
    • Research on state of the art cybersecurity solutions
  • Census
    Intern IT Security Engineer
    November 2022 - May 2023 (6 months)
    Greece
    • Worked for clients in all the various fields (mobile, software, web applications, pentests) of IT security.

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Education

  • RNCP +7 (Master) Network Information & Systems Architecture
    Campus 19 - 42 Network
    2025
    ▪ System programming (kernel development) ▪ C / C++ / x86-64 ASM / Python ▪ Malware development (metaphoric virus with anti-debugging, in x86 ASM) ▪ Web and binary exploitation ▪ Generic low-level programming (HTTP server in C, multi-threaded graphical projects) ▪ Cloud deployments, and DevOps concepts (docker, kubernetes, CI/CD, argocd)

Skill set

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