cvedb.io
CVE-2025-55214
UNKNOWN · CVSS n/a
EPSS exploitation probability: 0%
Published 2025-08-18T17:15:30.310 · Last modified 2026-06-17T09:41:28.297

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 over

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.