CVE-2021-4463
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-12

Last updated on: 2025-11-12

Assigner: VulnCheck

Description
Longjing Technology BEMS API versions up to and including 1.21 contains an unauthenticated arbitrary file download vulnerability in the 'downloads' endpoint. The 'fileName' parameter is not properly sanitized, allowing attackers to craft traversal sequences and access sensitive files outside the intended directory.
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Meta Information
Published
2025-11-12
Last Modified
2025-11-12
Generated
2026-06-16
AI Q&A
2025-11-13
EPSS Evaluated
2026-06-15
NVD
CVE-2021-4463
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
longjing_technology bems_api 1.21
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-552 The product makes files or directories accessible to unauthorized actors, even though they should not be.
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.
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Executive Summary

This vulnerability exists in Longjing Technology BEMS API versions up to and including 1.21. It is an unauthenticated arbitrary file download vulnerability in the 'downloads' endpoint. The 'fileName' parameter is not properly sanitized, which allows attackers to use traversal sequences to access sensitive files outside the intended directory.

Impact Analysis

An attacker can exploit this vulnerability to download arbitrary files from the server without authentication. This can lead to exposure of sensitive information, potentially compromising system confidentiality and security.

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