Keeping open source software secure is a collective effort, as exemplified by the OWASP Zed Attack Proxy (ZAP), a dynamic application security testing tool. Simon Bennetts, leader of the OWASP ZAP project and StackHawk engineer, highlights the tool's role in identifying web application vulnerabilities early in the development process, making it a cost-effective alternative to expensive commercial solutions. ZAP integrates seamlessly into CI/CD pipelines, allowing developers to address issues like cross-site scripting and SQL injection before deployment. Despite the open-source ethos of "many eyes" on the code, Bennetts notes that most contributors lack formal security training, underscoring the importance of tools like ZAP and complementary static application security testing (SAST) methodologies. He also emphasizes the necessity of regular dependency updates, facilitated by tools like Dependabot, and the value of security practices such as branch protection rules, mandatory code reviews, and the use of CodeQL for static code scanning. The ZAP project also enforces two-factor authentication and incentivizes security through a bug bounty program, rewarding discoveries of remote code execution vulnerabilities.