FKIE_CVE-2021-4463

Vulnerability from fkie_nvd - Published: 2025-11-12 22:15 - Updated: 2025-11-14 16:42
Severity ?
8.7 (High) - 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
Summary
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.
References
disclosure@vulncheck.comhttps://cxsecurity.com/issue/WLB-2021070173
disclosure@vulncheck.comhttps://exchange.xforce.ibmcloud.com/vulnerabilities/206477
disclosure@vulncheck.comhttps://packetstormsecurity.com/files/163702
disclosure@vulncheck.comhttps://web.archive.org/web/20220527162453/http://www.ljkj2012.com/
disclosure@vulncheck.comhttps://www.exploit-db.com/exploits/50163
disclosure@vulncheck.comhttps://www.vulncheck.com/advisories/longjing-technology-bems-api-remote-arbitrary-file-download
disclosure@vulncheck.comhttps://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5657.php
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Longjing Technology BEMS API versions up to and including 1.21 contains an unauthenticated arbitrary file download vulnerability in the \u0027downloads\u0027 endpoint. The \u0027fileName\u0027 parameter is not properly sanitized, allowing attackers to craft traversal sequences and access sensitive files outside the intended directory."
    }
  ],
  "id": "CVE-2021-4463",
  "lastModified": "2025-11-14T16:42:30.503",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-11-12T22:15:41.863",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://cxsecurity.com/issue/WLB-2021070173"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/206477"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://packetstormsecurity.com/files/163702"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://web.archive.org/web/20220527162453/http://www.ljkj2012.com/"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.exploit-db.com/exploits/50163"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/longjing-technology-bems-api-remote-arbitrary-file-download"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5657.php"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-552"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}


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