CVE-2025-55201

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.

Score

CVSS 4.0 8.5 High

Status

Deferred - security-advisories@github.com

Published

2025-08-18

Last modified

2025-08-18

Weaknesses

CWE-22

Affected products

• Copier (Copier-org)

References

• https://github.com/copier-org/copier/commit/3feea3b3ff3c20d80cbb16a2f3b9567ffc5606d1
• https://github.com/copier-org/copier/security/advisories/GHSA-3xw7-v6cj-5q8h