Arbitrary filesystem access via exposed Path methods
Published Aug 18, 2025 · Updated Aug 18, 2025
Path traversal in copier-org Copier before 9.9.1 allows context-dependent attackers to read, overwrite, or delete arbitrary files. The Jinja render context exposes _copier_conf path values as pathlib.Path objects, leaving resolve, read, write, glob, and delete methods callable without directory constraints. Exploitation requires a user or automated process to render an attacker-controlled template; process permissions bound the files exposed or altered.
Summary
What happened
Path traversal in copier-org Copier before 9.9.1 allows context-dependent attackers to read, overwrite, or delete arbitrary files. The Jinja render context exposes _copier_conf path values as pathlib.Path objects, leaving resolve, read, write, glob, and delete methods callable without directory constraints. Exploitation requires a user or automated process to render an attacker-controlled template; process permissions bound the files exposed or altered.
The record
- CVE
- CVE-2025-55201
- Published
- Aug 18, 2025
- Updated
- Aug 18, 2025
- Vendor
- copier-org
- Product
- Copier
- Classifications
- CWE-22, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 18, 2025CVE publishedPublication date reported by the CVE source.
- Aug 18, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 9.9.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Upstream arbitrary filesystem read/write reproductionsproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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