CVE-2025-55214Public exploit

Arbitrary file overwrite via rendered path traversal

Published Aug 18, 2025 · Updated Aug 18, 2025

Path traversal in copier-org Copier 7.1.0 through 9.9.0 allows context-dependent attackers to overwrite files via a crafted template. During generated-directory rendering, _render_template accepts absolute or parent-relative output paths produced by pathjoin without confirming that their resolved destinations remain beneath the project directory. Exploitation requires a user or process to render an attacker-controlled template, after which files writable by that process can be replaced.

CVSS severity6.9
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in copier-org Copier 7.1.0 through 9.9.0 allows context-dependent attackers to overwrite files via a crafted template. During generated-directory rendering, _render_template accepts absolute or parent-relative output paths produced by pathjoin without confirming that their resolved destinations remain beneath the project directory. Exploitation requires a user or process to render an attacker-controlled template, after which files writable by that process can be replaced.

The record

CVE
CVE-2025-55214
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

  1. Aug 18, 2025CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=>= 7.1.0, < 9.9.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

copier-org · Copierversion=>= 7.1.0, < 9.9.1

Published CVSS scores

6.9GitHub, Inc.CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002Malicious File

Public exploit references

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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