CVE-2021-4463

Nov. 12, 2025, 10:15 p.m.

8.7
High

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.

Product(s) Impacted

Vendor Product Versions
Longjing Technology
  • Bems Api
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a longjing_technology bems_api / / / / / / / /

References

https://cxsecurity.com/issue/WLB-2021070173
https://exchange.xforce.ibmcloud.com/vulnerabilities/206477
https://packetstormsecurity.com/files/163702
https://web.archive.org/web/20220527162453/http://www.ljkj2012.com/
https://www.exploit-db.com/exploits/50163
https://www.vulncheck.com/advisories/longjing-technology-bems-api-remote-arbitrary-file-download
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5657.php

Tags

CWE-22
disclosure@vulncheck.com
2025-11-12
CVE-2021-4463

CVSS Score

8.7 / 10

CVSS Data - 4.0

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Attack Requirements: NONE
  • Privileges Required: NONE
  • User Interaction: NONE
  • Scope:
  • Confidentiality Impact: HIGH
  • Integrity Impact: NONE
  • Availability Impact: NONE
  • Exploit Maturity: NOT_DEFINED

    • CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

    View Vector String

Timeline

Published: Nov. 12, 2025, 10:15 p.m.
Last Modified: Nov. 12, 2025, 10:15 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

disclosure@vulncheck.com

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.