The text outlines strategies for managing and mitigating security vulnerabilities in startups, emphasizing the importance of public-facing security measures. It suggests creating a security email alias to facilitate communication with security researchers and white hat hackers, establishing a vulnerability disclosure policy to define engagement rules, and considering a bug bounty program to incentivize vulnerability reporting. The text also highlights the significance of external vulnerability scanning, recommending starting with open-source tools like OWASP Zap and Nikto and progressing to automated commercial scanners for scheduled scans. The company Kinde is used as an example, demonstrating their implementation of these practices, such as setting up a security email and publishing a vulnerability disclosure policy, although they have not yet offered rewards for vulnerabilities discovered.