CVE-2025-27409

CVE-2025-27409 describes a path traversal vulnerability in Joplin Server versions prior to 3.3.3, allowing unauthorized access to files outside intended directories. This high-severity flaw (CVSS 7.5) can be exploited remotely without authentication, leading to critical information disclosure. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the vulnerability poses a significant risk due to its ease of exploitation and potential for sensitive data exposure. Organizations using affected Joplin Server versions should upgrade to 3.3.3 immediately to mitigate this risk.