CVE-2025-55201 — Copier safe template has arbitrary filesystem read/write access
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.Pat…
Published: 2025-08-18 · CVSS: 8.5 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7