Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
All editions of Rapid7 Metasploit prior to version 4.13.0-2017020701 contain a directory traversal vulnerability in the Meterpreter stdapi Dir.download() function. By using a specially-crafted build of Meterpreter, it is possible to write to an arbitrary directory on the Metasploit console with the permissions of the running Metasploit instance.
CWE-22 - Path Traversal
Path traversal (or directory traversal), is a vulnerability that allows malicious users to traverse the server's root directory, gaining access to arbitrary files and folders such as application code & data, back-end credentials, and sensitive operating system files. In the worst-case scenario, an attacker could potentially execute arbitrary files on the server, resulting in a denial of service attack. Such an exploit may severely impact the integrity, confidentiality, and availability of an application.