Vulnerability-Lookup

FKIE_CVE-2020-13821

Vulnerability from fkie_nvd - Published: 2020-08-26 16:15 - Updated: 2026-06-17 02:53

Severity

5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Summary

An issue was discovered in HiveMQ Broker Control Center 4.3.2. A crafted clientid parameter in an MQTT packet (sent to the Broker) is reflected in the client section of the management console. The attacker's JavaScript is loaded in a browser, which can lead to theft of the session and cookie of the administrator's account of the Broker.

References

URL	Tags
cve@mitre.org	https://payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqtt	Third Party Advisory
cve@mitre.org	https://www.hivemq.com/blog/hivemq-4-3-3-released/	Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqtt	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.hivemq.com/blog/hivemq-4-3-3-released/	Release Notes, Vendor Advisory

Impacted products

	Vendor	Product	Version
	hivemq	broker_control_center	4.3.2

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:hivemq:broker_control_center:4.3.2:*:*:*:*:*:*:*",
              "matchCriteriaId": "AAD15DD3-F8EA-4692-88D6-C646D051DB21",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in HiveMQ Broker Control Center 4.3.2. A crafted clientid parameter in an MQTT packet (sent to the Broker) is reflected in the client section of the management console. The attacker\u0027s JavaScript is loaded in a browser, which can lead to theft of the session and cookie of the administrator\u0027s account of the Broker."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un problema en HiveMQ Broker Control Center versi\u00f3n 4.3.2. Un par\u00e1metro clientid dise\u00f1ado en un paquete MQTT (enviado al Broker) es reflejado en la secci\u00f3n del cliente de la consola de administraci\u00f3n. El JavaScript del atacante es cargado en un navegador, lo que puede conllevar el robo de la sesi\u00f3n y una cookie de la cuenta del administrador del Broker"
    }
  ],
  "id": "CVE-2020-13821",
  "lastModified": "2026-06-17T02:53:43.357",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "NONE",
          "baseScore": 3.5,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 6.8,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-08-26T16:15:12.447",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqtt"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://www.hivemq.com/blog/hivemq-4-3-3-released/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqtt"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://www.hivemq.com/blog/hivemq-4-3-3-released/"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2020-13821 (GCVE-0-2020-13821)

Vulnerability from cvelistv5 – Published: 2020-08-26 15:23 – Updated: 2024-08-04 12:25

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 29/100 over 2193 records in the last 180 days details

References

2 references

URL	Tags
https://payatu.com/advisory/hivemq-mqtt-broker---…	x_refsource_MISC
https://www.hivemq.com/blog/hivemq-4-3-3-released/	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T12:25:16.551Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqtt"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://www.hivemq.com/blog/hivemq-4-3-3-released/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
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              "version": "n/a"
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      ],
      "descriptions": [
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-12-21T20:02:27.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqtt"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://www.hivemq.com/blog/hivemq-4-3-3-released/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-13821",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
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                    {
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                          {
                            "version_value": "n/a"
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                      }
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                "vendor_name": "n/a"
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            ]
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        "data_version": "4.0",
        "description": {
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              "value": "An issue was discovered in HiveMQ Broker Control Center 4.3.2. A crafted clientid parameter in an MQTT packet (sent to the Broker) is reflected in the client section of the management console. The attacker\u0027s JavaScript is loaded in a browser, which can lead to theft of the session and cookie of the administrator\u0027s account of the Broker."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
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                  "value": "n/a"
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        "references": {
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              "refsource": "MISC",
              "url": "https://payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqtt"
            },
            {
              "name": "https://www.hivemq.com/blog/hivemq-4-3-3-released/",
              "refsource": "CONFIRM",
              "url": "https://www.hivemq.com/blog/hivemq-4-3-3-released/"
            }
          ]
        }
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  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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    "datePublished": "2020-08-26T15:23:46.000Z",
    "dateReserved": "2020-06-04T00:00:00.000Z",
    "dateUpdated": "2024-08-04T12:25:16.551Z",
    "state": "PUBLISHED"
  },
  "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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