Vulnerability-Lookup

FKIE_CVE-2021-4406

Vulnerability from fkie_nvd - Published: 2023-07-10 16:15 - Updated: 2026-06-17 04:19

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Summary

An authenticated attacker is able to create alerts that trigger a stored XSS attack. POC * go to the alert manager * open the ITSM tab * add a webhook with the URL/service token value ' -h && id | tee /tmp/ttttttddddssss #' (whitespaces are tab characters) * click add * click apply * create a test alert * The test alert will run the command “id | tee /tmp/ttttttddddssss” as root. * after the test alert inspect /tmp/ttttttddddssss it'll contain the ids of the root user.

References

URL	Tags
csirt@divd.nl	https://csirt.divd.nl/CVE-2021-4406	Third Party Advisory
csirt@divd.nl	https://csirt.divd.nl/DIVD-2021-00020/
csirt@divd.nl	https://www.osnexus.com/products/software-defined-storage	Product
af854a3a-2127-422b-91ae-364da2661108	https://csirt.divd.nl/CVE-2021-4406	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.divd.nl/DIVD-2021-00020
af854a3a-2127-422b-91ae-364da2661108	https://www.osnexus.com/products/software-defined-storage	Product
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://csirt.divd.nl/cves/CVE-2021-4406/

Impacted products

	Vendor	Product	Version
	osnexus	quantastor	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "QuantaStor",
          "vendor": "OSNEXUS",
          "versions": [
            {
              "lessThanOrEqual": "6.0.0.355",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "csirt@divd.nl"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5E101217-36C7-4C28-8C61-7744481D2D0E",
              "versionEndExcluding": "6.0.0.355",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An authenticated attacker is able to create alerts that trigger a stored XSS attack.\n\nPOC\n\n\n  *  go to the alert manager\n\n\n  *  open the ITSM tab\n  *  add a webhook with the URL/service token value \n\n\u0027\t-h\t\u0026\u0026\tid\t|\ttee\t/tmp/ttttttddddssss\t#\u0027 (whitespaces are tab characters)\n\n\n  *  click add\n\n\n  *  click apply\n\n\n  *  create a test alert\n\n\n  *  The test alert will run the command \n\n\u201cid\t|\ttee\t/tmp/ttttttddddssss\u201d as root.\n\n\n  *  after the test alert inspect \n\n/tmp/ttttttddddssss it\u0027ll contain the ids of the root user."
    }
  ],
  "id": "CVE-2021-4406",
  "lastModified": "2026-06-17T04:19:41.547",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 6.0,
        "source": "csirt@divd.nl",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-4406",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-09-24T13:40:31.901830Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2023-07-10T16:15:47.747",
  "references": [
    {
      "source": "csirt@divd.nl",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://csirt.divd.nl/CVE-2021-4406"
    },
    {
      "source": "csirt@divd.nl",
      "url": "https://csirt.divd.nl/DIVD-2021-00020/"
    },
    {
      "source": "csirt@divd.nl",
      "tags": [
        "Product"
      ],
      "url": "https://www.osnexus.com/products/software-defined-storage"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://csirt.divd.nl/CVE-2021-4406"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://www.divd.nl/DIVD-2021-00020"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product"
      ],
      "url": "https://www.osnexus.com/products/software-defined-storage"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://csirt.divd.nl/cves/CVE-2021-4406/"
    }
  ],
  "sourceIdentifier": "csirt@divd.nl",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        }
      ],
      "source": "csirt@divd.nl",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-4406 (GCVE-0-2021-4406)

Vulnerability from cvelistv5 – Published: 2023-07-10 06:29 – Updated: 2025-09-24 15:46

Title

Authenticated Remote COmmand Execution as root in OSNEXUS QuantaStor version 6.0.0.355 and others

Summary

Severity

9.1 (Critical)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-09-24 13:40 UTC

CWE

CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')

Assigner

DIVD ENISA root

References

5 references

URL	Tags
https://csirt.divd.nl/DIVD-2021-00020/	third-party-advisory
https://www.osnexus.com/products/software-defined…	product
https://csirt.divd.nl/CVE-2021-4406	third-party-advisoryexploittechnical-description
https://www.divd.nl/DIVD-2021-00020	third-party-advisoryx_transferred
https://csirt.divd.nl/cves/CVE-2021-4406/	exploit

Impacted products

1 product

Vendor	Product	Version
OSNEXUS	QuantaStor	Affected: 0 , ≤ 6.0.0.355 (semver)

Credits

Wietse Boonstra (DIVD) Frank Breedijk (DIVD) Victor Pasman (DIVD) Victor Gevers (DIVD) Max van der Horst (DIVD) Célistine Oosting (DIVD)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:23:10.705Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "third-party-advisory",
              "x_transferred"
            ],
            "url": "https://www.divd.nl/DIVD-2021-00020"
          },
          {
            "tags": [
              "product",
              "x_transferred"
            ],
            "url": "https://www.osnexus.com/products/software-defined-storage"
          },
          {
            "tags": [
              "third-party-advisory",
              "x_transferred"
            ],
            "url": "https://csirt.divd.nl/CVE-2021-4406"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-4406",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-24T13:40:31.901830Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-09-24T13:40:46.757Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://csirt.divd.nl/cves/CVE-2021-4406/"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "QuantaStor",
          "vendor": "OSNEXUS",
          "versions": [
            {
              "lessThanOrEqual": "6.0.0.355",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Wietse Boonstra (DIVD)"
        },
        {
          "lang": "en",
          "type": "analyst",
          "value": "Frank Breedijk (DIVD)"
        },
        {
          "lang": "en",
          "type": "analyst",
          "value": "Victor Pasman (DIVD)"
        },
        {
          "lang": "en",
          "type": "analyst",
          "value": "Victor Gevers (DIVD)"
        },
        {
          "lang": "en",
          "type": "analyst",
          "value": "Max van der Horst (DIVD)"
        },
        {
          "lang": "en",
          "type": "analyst",
          "value": "C\u00e9listine Oosting (DIVD)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "An authenticated attacker is able to create alerts that trigger a stored XSS attack.\u003cbr\u003e\u003cbr\u003ePOC\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003col\u003e\u003cli\u003e\u003cp\u003ego to the alert manager\u003c/p\u003e\u003c/li\u003e\u003cli\u003eopen the ITSM tab\u003c/li\u003e\u003cli\u003e\u003cp\u003eadd a webhook with the URL/service token value \u003c/p\u003e\u003ctt\u003e\u0027\t-h\t\u0026amp;\u0026amp;\tid\t|\ttee\t/tmp/ttttttddddssss\t#\u0027\u003c/tt\u003e\u003cp\u003e (whitespaces are tab characters)\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp\u003eclick add\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp\u003eclick apply\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp\u003ecreate a test alert\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp\u003eThe test alert will run the command \u003c/p\u003e\u003ctt\u003e\u201cid\t|\ttee\t/tmp/ttttttddddssss\u201d\u003c/tt\u003e\u003cp\u003e as root.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp\u003eafter the test alert inspect \u003c/p\u003e\u003ctt\u003e/tmp/ttttttddddssss\u003c/tt\u003e\u003cp\u003e it\u0027ll contain the ids of the root user.\u003cbr\u003e\u003c/p\u003e\u003c/li\u003e\u003c/ol\u003e\u003cb\u003e\u003c/b\u003e\u003cbr\u003e"
            }
          ],
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      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "LOW",
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          "scenarios": [
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          "url": "https://www.osnexus.com/products/software-defined-storage"
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          "url": "https://csirt.divd.nl/CVE-2021-4406"
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      "source": {
        "discovery": "INTERNAL"
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    "assignerShortName": "DIVD",
    "cveId": "CVE-2021-4406",
    "datePublished": "2023-07-10T06:29:48.698Z",
    "dateReserved": "2023-07-05T15:24:56.556Z",
    "dateUpdated": "2025-09-24T15:46:35.837Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2021-4406

CVE-2021-4406 (GCVE-0-2021-4406)

Tags

Sightings

Nomenclature

Related by attack behaviour