Profile
Who am I?
Valentin Lobstein
@Chocapikk
Security Researcher & Exploit Developer at VulnCheck, specialized in vulnerability research, reverse engineering, and production-grade exploit development.
Active in offensive tooling, automation, and large-scale attack surface analysis. Contributor to open-source projects, notably Metasploit, with a focus on reliable, real-world exploitation, not just proof-of-concept scripting.
Team
Professional Experience
United States (Remote)
VulnCheck , Security Researcher & Exploit Developer
- - Vulnerability research and exploit development
- - Contributing to VulnCheck's exploit intelligence and vulnerability analysis
Belgium (Partial Remote)
LeakIX , Security Researcher
- - Writing plugins for vulnerability detection on the platform
- - Setting up R&D labs to reproduce n-day vulnerabilities
- - Vulnerability monitoring and research
Paris, France
Onepoint , Offensive Security Intern (Pentesting focus)
- - Conducted penetration tests and security assessments, with a focus on web application testing
- - Performed security evaluations for APIs and mobile applications targeting clients in critical sectors: finance, banking, insurance, and the public sector
- - Identified vulnerabilities with potential impact on sensitive infrastructures
Antony, France
UPFRONT TECHNOLOGIES , Offensive Security Intern (Pentesting focus)
- - Participation in penetration tests and security assessments, contributing to various technical engagements
- - Performed audits and vulnerability assessments
- - Developed offensive security skills while training for the eJPT and OSWP certifications
Education
Paris, France
Master's Degree - Cybersecurity and Computer Science (Technical Expert track)
Strasbourg, France
Bachelor's Degree in Computer Science, specialization in Web Development
Haguenau, France
High School Diploma (French Scientific Baccalaureate - Engineering Sciences option)
Contributions
Contributor, The Metasploit Project
- - Top contributor in 2024/2025
- - Development of exploit modules for Metasploit
- - Creation and enhancement of payloads and auxiliary modules
- - Contribution to the community by adding new offensive features
Hunter & Moderator, LeakIX
- - Monitoring of CVEs and 0-day vulnerabilities
- - Moderation of submitted vulnerability reports
- - Reporting security flaws to CERTs or affected entities
- - Writing PoCs to support plugin development
Skills
Technical Arsenal
Languages
Tools
Platforms
Projects
Awards
Certifications
Journey
How this site evolved over the years, captured from the Wayback Machine.
Source Code & PoCs
All my exploits, PoCs, and security tools are open source. Check out my repositories for vulnerability research and tooling.
Access Repositories →Hall of Fame
Thanks
Oteria Cyber School·Metasploit Framework team·LeakIX·VulnCheck