FileCodeBox up to 2.2 POST core/storage.py SystemFileStorage.save_file path traversal

Summaryinfo

A vulnerability marked as critical has been reported in FileCodeBox up to 2.2. This issue affects the function SystemFileStorage.save_file of the file core/storage.py of the component POST Handler. The manipulation leads to path traversal. This vulnerability is traded as CVE-2025-51661. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in FileCodeBox up to 2.2. This issue affects the function SystemFileStorage.save_file of the file core/storage.py of the component POST Handler. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A path Traversal vulnerability found in FileCodeBox v2.2 and earlier allows arbitrary file writes when application is configured to use local filesystem storage. SystemFileStorage.save_file method in core/storage.py uses filenames from user input without validation to construct save_path and save files. This allows remote attackers to perform arbitrary file writes outside the intended directory by sending crafted POST requests with malicious traversal sequences to /share/file/ upload endpoint, which does not require any authorization.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-51661 since 06/16/2025. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/19/2025). MITRE ATT&CK project uses the attack technique T1006 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• FileCodeBox

Version

• 2.0
• 2.1
• 2.2

CPE 2.3info

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• 🔒
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CPE 2.2info

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• 🔒
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