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Vulnerabilites related to copier-org - copier

CVE-2025-55214 (GCVE-0-2025-55214)

Vulnerability from cvelistv5

Published

2025-08-18 16:36

Modified

2025-08-18 19:47

Severity ?

6.9 (Medium) - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Summary

Copier library and CLI app for rendering project templates. From 7.1.0 to before 9.9.1, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the --UNSAFE,--trust flag. As it turns out, a safe template can currently write files outside the destination path where a project shall be generated or updated. This is possible when rendering a generated directory structure whose rendered path is either a relative parent path or an absolute path. Constructing such paths is possible using Copier's builtin pathjoin Jinja filter and its builtin _copier_conf.sep variable, which is the platform-native path separator. This way, a malicious template author can create a template that overwrites arbitrary files (according to the user's write permissions), e.g., to cause havoc. This vulnerability is fixed in 9.9.1.

References

►

URL

Tags

	https://github.com/copier-org/copier/security/advisories/GHSA-p7q8-grrj-3m8w	x_refsource_CONFIRM
	https://github.com/copier-org/copier/commit/fdbc0167cc22780b497e4db176feaf6f024757d6	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	copier-org	copier	Version: >= 7.1.0, < 9.9.1

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CVE-2025-55201 (GCVE-0-2025-55201)