Roundcube — Vulnerabilities & Security Advisories 39

Roundcube serves as a web-based email client with IMAP support, enabling users to access and manage email through browsers. Historically, it has faced vulnerabilities including remote code execution, cross-site scripting, and privilege escalation, often stemming from improper input validation and session management issues. The application has experienced notable security incidents, including a 2020 supply chain attack where malicious code was added to its update mechanism, affecting multiple installations. Despite these challenges, regular security updates and community vigilance help mitigate risks, though its widespread deployment continues to make it a target for attackers seeking to exploit email access for further compromise.