Spencer Pearlman, a Security Researcher at Detectify, emphasizes the importance of adopting a hacker's mindset to identify vulnerabilities in open-source software, highlighting that many hackers target open-source due to its transparency, which can also be an asset in quickly identifying and addressing security flaws. The approach involves a three-step methodology: recon using both dynamic analysis and open-source intelligence (OSINT), followed by static code analysis. Dynamic analysis helps understand how an application is supposed to function, while OSINT involves gathering information from sources like GitHub, GitLab, and forums such as Stackoverflow to uncover potential vulnerabilities. Static analysis, enhanced by tools like Semgrep, focuses on detecting common vulnerabilities and data mishandling. Detectify's strategy involves collaborating with ethical hackers to crowdsource vulnerability information, offering a unique approach that includes per-hit payouts for popular vulnerability modules. This method allows Detectify to rapidly incorporate and test new vulnerabilities, providing enhanced security scanning for users and ensuring they remain protected against emerging threats.