Unstructured-IO unstructured up to 0.18.17 partition_msg path traversal

Summaryinfo

A vulnerability labeled as critical has been found in Unstructured-IO unstructured up to 0.18.17. Impacted is the function partition_msg. The manipulation results in path traversal. This vulnerability is reported as CVE-2025-64712. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Unstructured-IO unstructured up to 0.18.17. It has been classified as critical. Affected is the function partition_msg. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The unstructured library provides open-source components for ingesting and pre-processing images and text documents, such as PDFs, HTML, Word docs, and many more. Prior to version 0.18.18, a path traversal vulnerability in the partition_msg function allows an attacker to write or overwrite arbitrary files on the filesystem when processing malicious MSG files with attachments. This issue has been patched in version 0.18.18.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-64712 since 11/10/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 0.18.18 eliminates this vulnerability. Applying the patch b01d35b2373fd087d2e15162b9c021663c97155d is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• Unstructured-IO

Name

• unstructured

Version

• 0.18.0
• 0.18.1
• 0.18.2
• 0.18.3
• 0.18.4
• 0.18.5
• 0.18.6
• 0.18.7
• 0.18.8
• 0.18.9
• 0.18.10
• 0.18.11
• 0.18.12
• 0.18.13
• 0.18.14
• 0.18.15
• 0.18.16
• 0.18.17

License

• open-source

Website

• Product: https://github.com/Unstructured-IO/unstructured/

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