C4illin ConvertX up to 0.15.x /upload file.name path traversal

Summaryinfo

A vulnerability, which was classified as critical, was found in C4illin ConvertX up to 0.15.x. The affected element is an unknown function of the file /upload. Executing a manipulation of the argument file.name can lead to path traversal. This vulnerability is tracked as CVE-2025-66449. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in C4illin ConvertX up to 0.15.x. It has been declared as critical. This vulnerability affects some unknown functionality of the file /upload. The manipulation of the argument file.name with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

ConvertXis a self-hosted online file converter. In versions prior to 0.16.0, the endpoint `/upload` allows an authenticated user to write arbitrary files on the system, overwriting binaries and allowing code execution. The upload function takes `file.name` directly from user supplied data without doing any sanitization on the name thus allowing for arbitrary file write. This can be used to overwrite system binaries with ones provided from an attacker allowing full code execution. Version 0.16.0 contains a patch for the issue.

The advisory is available at github.com. This vulnerability was named CVE-2025-66449 since 12/01/2025. The exploitation appears to be easy. The attack can be initiated remotely. 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 0.16.0 eliminates this vulnerability. Applying the patch 550f472451755d095cf5802bc91f403e85b7129e 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.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202512-3131). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• C4illin

Name

• ConvertX

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15

License

• open-source

Website

• Product: https://github.com/C4illin/ConvertX/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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