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CVE-2021-34575

Estado: ModificadaAlta (7.5)—

In MB connect line mymbCONNECT24, mbCONNECT24 in versions <= 2.8.0 an unauthenticated user can enumerate valid users by checking what kind of response the server sends.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (2)

Mbconnectline — Mbconnect24Mbconnectline — Mymbconnect24

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-34575",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "info@cert.vde.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "info@cert.vde.com",
      "affectedData": [
        {
          "vendor": "MB connect line",
          "product": "mymbCONNECT24",
          "versions": [
            {
              "status": "affected",
              "version": "2.8.0",
              "versionType": "custom",
              "lessThanOrEqual": "2.8.0"
            }
          ]
        },
        {
          "vendor": "MB connect line",
          "product": "mbCONNECT24",
          "versions": [
            {
              "status": "affected",
              "version": "2.8.0",
              "versionType": "custom",
              "lessThanOrEqual": "2.8.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-08-02T11:15:11.417",
  "references": [
    {
      "url": "https://cert.vde.com/de-de/advisories/vde-2021-030",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "info@cert.vde.com"
    },
    {
      "url": "https://cert.vde.com/de-de/advisories/vde-2021-030",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "info@cert.vde.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In MB connect line mymbCONNECT24, mbCONNECT24 in versions <= 2.8.0 an unauthenticated user can enumerate valid users by checking what kind of response the server sends."
    },
    {
      "lang": "es",
      "value": "En MB connect line mymbCONNECT24, mbCONNECT24 versiones anteriores a 2.8.0 incluyéndolas, un usuario no autenticado puede enumerar usuarios válidos al comprobar qué tipo de respuesta envía el servidor"
    }
  ],
  "lastModified": "2026-06-17T03:56:09.490",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mbconnectline:mbconnect24:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CDED8162-6FEE-4FDD-BFFC-93DDCE1CA011",
              "versionEndIncluding": "2.8.0"
            },
            {
              "criteria": "cpe:2.3:a:mbconnectline:mymbconnect24:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "29848C2B-8AE1-4D89-B9C6-A586C591D40A",
              "versionEndIncluding": "2.8.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "info@cert.vde.com"
}