Vulnerability-Lookup

GHSA-2P54-Q56G-9668

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

Details

TestLink versions 1.16 through 1.19 contain an unauthenticated file download vulnerability in the attachmentdownload.php endpoint. Attackers can download arbitrary files by iterating file IDs through the 'id' parameter with 'skipCheck=1' to bypass access controls.

Severity ?

9.8 (Critical)


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

6.9 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47760"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-15T16:16:06Z",
    "severity": "MODERATE"
  },
  "details": "TestLink versions 1.16 through 1.19 contain an unauthenticated file download vulnerability in the attachmentdownload.php endpoint. Attackers can download arbitrary files by iterating file IDs through the \u0027id\u0027 parameter with \u0027skipCheck=1\u0027 to bypass access controls.",
  "id": "GHSA-2p54-q56g-9668",
  "modified": "2026-01-15T18:31:29Z",
  "published": "2026-01-15T18:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47760"
    },
    {
      "type": "WEB",
      "url": "https://testlink.org"
    },
    {
      "type": "WEB",
      "url": "https://web.archive.org/web/20211208031345/https://nch.ninja/blog/unauthorized-file-download-attached-files-testlink-116-119"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/50578"
    }
  ],
  "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:L/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-2021-47760 (GCVE-0-2021-47760)

Vulnerability from cvelistv5 – Published: 2026-01-15 15:52 – Updated: 2026-01-15 16:54

Title

TestLink 1.19 - Arbitrary File Download (Unauthenticated)

Summary

Severity ?

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/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-639 - Authorization Bypass Through User-Controlled Key

Assigner

VulnCheck

References

URL

Tags

	https://www.exploit-db.com/exploits/50578	exploit
	https://testlink.org/	product
	https://web.archive.org/web/20211208031345/https:…	technical-descriptionexploit

Impacted products

	Vendor	Product	Version
	Testlink	TestLink	Affected: 1.16 <= 1.19

Credits

Gonzalo Villegas (Cl34r)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47760",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-15T16:54:42.684984Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-01-15T16:54:50.020Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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      }
    ],
    "cna": {
      "affected": [
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          "product": "TestLink",
          "vendor": "Testlink",
          "versions": [
            {
              "status": "affected",
              "version": "1.16 \u003c= 1.19"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Gonzalo Villegas (Cl34r)"
        }
      ],
      "datePublic": "2021-07-12T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "TestLink versions 1.16 through 1.19 contain an unauthenticated file download vulnerability in the attachmentdownload.php endpoint. Attackers can download arbitrary files by iterating file IDs through the \u0027id\u0027 parameter with \u0027skipCheck=1\u0027 to bypass access controls."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "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:L/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
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            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
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      "problemTypes": [
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          "descriptions": [
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      "providerMetadata": {
        "dateUpdated": "2026-01-15T15:52:06.479Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "ExploitDB-50578",
          "tags": [
            "exploit"
          ],
          "url": "https://www.exploit-db.com/exploits/50578"
        },
        {
          "name": "Official TestLink Product Homepage",
          "tags": [
            "product"
          ],
          "url": "https://testlink.org/"
        },
        {
          "name": "Archived Researcher Blog",
          "tags": [
            "technical-description",
            "exploit"
          ],
          "url": "https://web.archive.org/web/20211208031345/https://nch.ninja/blog/unauthorized-file-download-attached-files-testlink-116-119/"
        }
      ],
      "title": "TestLink 1.19 - Arbitrary File Download (Unauthenticated)",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
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    "datePublished": "2026-01-15T15:52:06.479Z",
    "dateReserved": "2026-01-14T14:39:44.734Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-2P54-Q56G-9668

CVE-2021-47760 (GCVE-0-2021-47760)

Tags

Sightings

Nomenclature