Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Jellyfin is a free-software media system. Versions 10.8.0-alpha2 through 10.8.9 have a directory traversal vulnerability inside the "ClientLogController", specifically "/ClientLog/Document". When combined with a cross-site scripting vulnerability (CVE-2023-30627), this can result in file write and arbitrary code execution.
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.