CVE-2025-55201 HIGH

CVE-2025-55201: Copier safe template has arbitrary filesystem read/write access

Vendor Copier-Org
Product copier
Weakness CWE-22 · Path traversal
Published August 18, 2025
Last update August 18, 2025
View on NVD All CVEs

CVSS base score

8.5/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Copier library and CLI app for rendering project templates. Prior to 9.9.1, 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 w.r.t. filesystem access useless. This vulnerability is fixed in 9.9.1.

Key dates

02Disclosure timeline

August 18, 2025 CVE published
August 18, 2025 Record updated