CVE-2025-8021: files-bucket-server Directory Traversal Vulnerability
Summary
CVE-2025-8021: files-bucket-server vulnerable to Directory Traversal. Affects files-bucket-server versions < 1.2.6. No fix is published. How to fix ↓
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Background
The 'files-bucket-server' package is an npm module designed to facilitate file storage and retrieval in a server environment. It allows users to upload and manage files efficiently. However, due to its design, it has been found to be vulnerable to directory traversal attacks, which can lead to unauthorized access to sensitive files on the server.
Vulnerability Detail
The vulnerability arises from improper validation of user input, allowing attackers to manipulate file paths and access files outside the intended directory. This can lead to exposure of sensitive information, including configuration files and user data. The severity of this vulnerability is classified as high, with a CVSS score of 7.5, indicating a significant risk to affected systems.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If you cannot update the package immediately, consider implementing input validation to sanitize user inputs and restrict file access to only the intended directories. This can be done by checking the file paths against a whitelist of allowed directories before processing any file requests.
Conclusion
The 'files-bucket-server' package has a critical directory traversal vulnerability (CVE-2025-8021) that can expose sensitive files to attackers. It is essential to update to the patched version (1.2.7 or later) to mitigate this risk. Implementing input validation can serve as a temporary workaround. Regular monitoring using tools like Vulert can help maintain the security of your application.
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FAQ
A directory traversal vulnerability allows an attacker to access files and directories that are stored outside the intended directory, potentially exposing sensitive information.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By checking your package-lock.json file, you can determine if your application is affected by this vulnerability.
The risks include unauthorized access to sensitive files, potential data breaches, and exposure of configuration files that could lead to further exploitation of the system.
Yes, implementing strict input validation and sanitization can help mitigate the risk until you can apply the necessary updates.
More information can be found in the official advisory on GitHub or by using the Vulert playground to check for vulnerabilities in your application.
Related vulnerabilities
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