Penetration Tester · Offensive Security Researcher · Barcelona

Hi, I'm Wannes Verwimp.
I find what others miss.

I'm a -year-old with a deep passion for offensive security. By day I work as a penetration tester at Integrity360 — by night I keep myself busy with security research and bug bounty hunting. I especially enjoy finding vulnerabilities that others walk past.

Known as groeneappel on HackerOne and Intigriti.

1

CVE publicly disclosed

more in pipeline →

24M+

Websites exposed via Cloudflare CVE

22nd

Cyber Security Belgium 2025 out of 360 teams

Certifications

Experience

CVEs & vulnerability research

Publicly disclosed CVEs — more in responsible disclosure pipeline