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CVE-2021-34580

Estado: ModificadaAlta (7.5)—

In mymbCONNECT24, mbCONNECT24 <= 2.9.0 an unauthenticated user can enumerate valid backend users by checking what kind of response the server sends for crafted invalid login attempts.

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-2021-34580",
  "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": "2.9.0",
              "versionType": "custom",
              "lessThanOrEqual": "2.9.0"
            }
          ]
        },
        {
          "vendor": "MB connect line",
          "product": "mbCONNECT24",
          "versions": [
            {
              "status": "affected",
              "version": "2.9.0",
              "versionType": "custom",
              "lessThanOrEqual": "2.9.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-10-27T11:15:07.553",
  "references": [
    {
      "url": "https://cert.vde.com/en/advisories/VDE-2021-037/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "info@cert.vde.com"
    },
    {
      "url": "https://cert.vde.com/en/advisories/VDE-2021-037/",
      "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-204"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In mymbCONNECT24, mbCONNECT24 <= 2.9.0 an unauthenticated user can enumerate valid backend users by checking what kind of response the server sends for crafted invalid login attempts."
    },
    {
      "lang": "es",
      "value": "En mymbCONNECT24, mbCONNECT24 versiones anteriores a 2.9.0 incluyéndola, un usuario no autenticado puede enumerar los usuarios válidos del backend al comprobar qué tipo de respuesta envía el servidor para los intentos de inicio de sesión no válidos diseñados"
    }
  ],
  "lastModified": "2026-06-17T03:56:10.077",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mbconnectline:mbconnect24:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C6FA138E-7298-488C-91CB-27A3AE49AA3C",
              "versionEndIncluding": "2.9.0"
            },
            {
              "criteria": "cpe:2.3:a:mbconnectline:mymbconnect24:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6149BB15-4765-4412-A071-C7880A52E3B3",
              "versionEndIncluding": "2.9.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "info@cert.vde.com"
}