Copier safe template has arbitrary filesystem read/write access_CVE-2025-55201

8.5 / 10

HIGH

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

Description

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.

Basic Information

ID CVE-2025-55201

Source GitHub_M

Published Aug 18, 2025 at 16:21

Modified Aug 18, 2025 at 17:37

Affected Product

Vendor copier-org

Product copier

Version < 9.9.1

Affected Versions copier-org copier < 9.9.1

CWE Classification

CWE-22

References

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    "published": "2025-08-18T16:21:25.576Z",
    "modified": "2025-08-18T17:37:53.420Z",
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    "references": "https://github.com/copier-org/copier/security/advisories/GHSA-3xw7-v6cj-5q8h\nhttps://github.com/copier-org/copier/commit/3feea3b3ff3c20d80cbb16a2f3b9567ffc5606d1",
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