Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVE-2026-42605
Summary
The `currentDirectory` request parameter in the Flow.js media upload endpoint (`POST /api/station/{station_id}/files/upload`) is not sanitized for path traversal sequences. When combined with a local filesystem storage backend (the default), an authenticated user with media management permissions can write arbitrary files outside the station's media storage directory, achieving remote code execution by writing a PHP webshell to the web root. Versions prior to 0.23.6 are affected.
- LOW
- NETWORK
- HIGH
- UNCHANGED
- NONE
- LOW
- HIGH
- HIGH
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.
References
Advisory Timeline
- Published
