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
Detection
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