Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVE-2025-55201
Summary
Copier library and CLI app for rendering project templates. A safe template can currently read and write arbitrary files because Copier exposes a few "pathlib.Path" objects in the Jinja context, which have unconstrained I/O methods. This effectively renders the security model with respect to filesystem access useless. This issue affects the package copier versions prior to 9.9.1.
- LOW
- LOCAL
- PASSIVE
- NONE
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
