File Access Vulnerability in Copier Library and CLI Application
CVE-2025-55201

8.5HIGH

Key Information:

Vendor

Copier-org

Status
Copier
Vendor
CVE Published:
18 August 2025

What is CVE-2025-55201?

The Copier library and its CLI application possess a flaw that allows safe templates to read and write arbitrary files, due to the exposure of pathlib.Path objects in the Jinja context. This vulnerability jeopardizes the integrity of the security model concerning filesystem access, effectively rendering it ineffective. Users are encouraged to upgrade to version 9.9.1 or later for remediation.

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Deploy the Patch

Affected Version(s)

copier < 9.9.1

References

https://github.com/copier-org/copier/security/advisories/...
x_refsource_CONFIRM
https://github.com/copier-org/copier/commit/3feea3b3ff3c2...
x_refsource_MISC

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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