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.

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00028.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Copier-org
  • Copier

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Copier-org
  • Copier
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/copier-org/copier/commit/3feea3b3ff3c20d80cbb16a2f3b9567ffc5606d1 cve-icon cve-icon
https://github.com/copier-org/copier/security/advisories/GHSA-3xw7-v6cj-5q8h cve-icon cve-icon
History

Mon, 18 Aug 2025 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Copier-org
Copier-org copier
Vendors & Products Copier-org
Copier-org copier

Mon, 18 Aug 2025 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 18 Aug 2025 16:45:00 +0000

Type Values Removed Values Added
References

Mon, 18 Aug 2025 16:30:00 +0000

Type Values Removed Values Added
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.
Title Copier safe template has arbitrary filesystem read/write access
Weaknesses CWE-22
References
Metrics cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-08-18T17:37:53.420Z

Reserved: 2025-08-08T21:55:07.965Z

Link: CVE-2025-55201

cve-icon Vulnrichment

Updated: 2025-08-18T17:37:46.604Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-08-18T17:15:29.933

Modified: 2025-08-18T20:16:28.750

Link: CVE-2025-55201

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-08-18T21:20:44Z