mailcow — Vulnerabilities & Security Advisories 21

mailcow is an open-source mail server solution designed to provide a comprehensive, self-hosted email infrastructure for organizations and individuals. Its architecture integrates Postfix, Dovecot, and SOGo, aiming to simplify the deployment of secure email services. Historically, the software has been associated with various vulnerability classes, including remote code execution, cross-site scripting, and privilege escalation, often stemming from complex configuration interactions or unpatched dependencies. With twenty CVEs currently on record, these issues typically highlight challenges in maintaining secure defaults and managing third-party components within the Docker-based environment. While no single catastrophic incident has defined its history, the recurring nature of these flaws underscores the importance of rigorous patch management. Users must prioritize regular updates and strict access controls to mitigate risks, ensuring the platform remains a viable option for those seeking full control over their email communications without relying on proprietary services.