Vulnerability-Lookup

GHSA-C22C-G99C-VW87

Vulnerability from github – Published: 2026-01-15 18:31 – Updated: 2026-01-15 18:31

Details

Oliver Library Server v5 contains a file download vulnerability that allows unauthenticated attackers to access arbitrary system files through unsanitized input in the FileServlet endpoint. Attackers can exploit the vulnerability by manipulating the 'fileName' parameter to download sensitive files from the server's filesystem.

Severity ?

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47755"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-15T16:16:06Z",
    "severity": "HIGH"
  },
  "details": "Oliver Library Server v5 contains a file download vulnerability that allows unauthenticated attackers to access arbitrary system files through unsanitized input in the FileServlet endpoint. Attackers can exploit the vulnerability by manipulating the \u0027fileName\u0027 parameter to download sensitive files from the server\u0027s filesystem.",
  "id": "GHSA-c22c-g99c-vw87",
  "modified": "2026-01-15T18:31:29Z",
  "published": "2026-01-15T18:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47755"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/50599"
    },
    {
      "type": "WEB",
      "url": "https://www.softlinkint.com/product/oliver"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2021-47755 (GCVE-0-2021-47755)

Vulnerability from cvelistv5 – Published: 2026-01-15 15:52 – Updated: 2026-01-15 18:27

Title

Oliver Library Server v5 - Arbitrary File Download

Summary

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

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

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

Assigner

VulnCheck

References

URL

Tags

	https://www.exploit-db.com/exploits/50599	exploit
	https://www.softlinkint.com/product/oliver/	product

Impacted products

	Vendor	Product	Version
	Softlink Education	Oliver Library Server	Affected: < 8.00.008.053

Credits

Mandeep Singh, Ishaan Vij, Luke Blues, CTRL Group

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47755",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-15T18:23:49.148028Z",
                "version": "2.0.3"
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        {
          "product": "Oliver Library Server",
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          "versions": [
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        }
      ],
      "metrics": [
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            "Recovery": "NOT_DEFINED",
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          "name": "ExploitDB-50599",
          "tags": [
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          ],
          "url": "https://www.exploit-db.com/exploits/50599"
        },
        {
          "name": "Oliver Library Server Official Product Homepage",
          "tags": [
            "product"
          ],
          "url": "https://www.softlinkint.com/product/oliver/"
        }
      ],
      "title": "Oliver Library Server v5 - Arbitrary File Download",
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  },
  "cveMetadata": {
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-C22C-G99C-VW87

CVE-2021-47755 (GCVE-0-2021-47755)

Tags

Sightings

Nomenclature