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CVE PROGRAM SOURCE RECORD8.5 High

CVE-2025-55201

Copier safe template has arbitrary filesystem read/write access

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

copier-org copier

  • < 9.9.1affected

References