VDE-2025-035

Vulnerability from csaf_mbconnectlinegmbh - Published: 2025-06-24 10:00 - Updated: 2025-06-24 10:00
Summary
Vulnerabilities in mbCONNECT24/mymbCONNECT24
Severity
Critical
Notes
Summary: Two vulnerabilities in mbCONNECT24/mymbCONNECT24 can lead to user enumeration an password bypass.
Impact: CVE-2025-3091: An attacker in possession of the second factor for an user can login as that user without knowledge of the password (first factor) CVE-2025-3092: An unprotected endpoint can by used to enumerate valid user names.
Remediation: CVE-2025-3091: Update to latest version: 2.16.5 CVE-2025-3092: Update to latest version: 2.18.0
General Recommendation: Always use the latest available firmware version on all devices.
CVE-2025-3091

An low privileged remote attacker in possession of the second factor for another user can login as that user without knowledge of the other user`s password.

7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-639 - Authorization Bypass Through User-Controlled Key
Vendor Fix Update to latest version: 2.16.5
CVE-2025-3092

An unauthenticated remote attacker can enumerate valid user names from an unprotected endpoint.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE-204 - Observable Response Discrepancy
Vendor Fix Update to latest version: 2.18.0
References
Acknowledgments
CERT@VDE certvde.com
Eviden Peter Husted Simonsen Irwin Przeperski
To clipboard 

{
  "document": {
    "acknowledgments": [
      {
        "organization": "CERT@VDE",
        "summary": "coordination",
        "urls": [
          "https://certvde.com"
        ]
      },
      {
        "names": [
          "Peter Husted Simonsen",
          "Irwin Przeperski"
        ],
        "organization": "Eviden",
        "summary": "reporting"
      }
    ],
    "aggregate_severity": {
      "namespace": "https://mbconnectline.com",
      "text": "critical"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
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    "lang": "en-GB",
    "notes": [
      {
        "category": "summary",
        "text": "Two vulnerabilities in mbCONNECT24/mymbCONNECT24 can lead to user enumeration an password bypass.",
        "title": "Summary"
      },
      {
        "category": "description",
        "text": "CVE-2025-3091: An attacker in possession of the second factor for an user can login as that user without knowledge of the password (first factor)\n\nCVE-2025-3092: An unprotected endpoint can by used to enumerate valid user names.",
        "title": "Impact"
      },
      {
        "category": "description",
        "text": "CVE-2025-3091: Update to latest version: 2.16.5\n\nCVE-2025-3092: Update to latest version: 2.18.0",
        "title": "Remediation"
      },
      {
        "category": "general",
        "text": "Always use the latest available firmware version on all devices.",
        "title": "General Recommendation"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "security-team@mbconnectline.de",
      "name": "MB connect line GmbH",
      "namespace": "https://mbconnectline.com"
    },
    "references": [
      {
        "category": "external",
        "summary": "MB connect line GmbH Advisories",
        "url": "https://mbconnectline.com/security-advice"
      },
      {
        "category": "external",
        "summary": "CERT@VDE Security Advisories for MB connect line GmbH",
        "url": "https://certvde.com/en/advisories/vendor/mbconnectline"
      },
      {
        "category": "self",
        "summary": "VDE-2025-035: Vulnerabilities in mbCONNECT24/mymbCONNECT24 - HTML",
        "url": "https://certvde.com/en/advisories/VDE-2025-035"
      },
      {
        "category": "self",
        "summary": "VDE-2025-035: Vulnerabilities in mbCONNECT24/mymbCONNECT24 - CSAF",
        "url": "https://mbconnectline.csaf-tp.certvde.com/.well-known/csaf/white/2025/vde-2025-035.json"
      }
    ],
    "title": "Vulnerabilities in mbCONNECT24/mymbCONNECT24",
    "tracking": {
      "aliases": [
        "VDE-2025-035"
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      "current_release_date": "2025-06-24T10:00:00.000Z",
      "generator": {
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      "initial_release_date": "2025-06-24T10:00:00.000Z",
      "revision_history": [
        {
          "date": "2025-06-24T10:00:00.000Z",
          "number": "1",
          "summary": "Initial revision."
        }
      ],
      "status": "final",
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    }
  },
  "product_tree": {
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                      "product_id": "CSAFPID-11001"
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                  },
                  {
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          {
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                "name": "2.18.0",
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              },
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                "name": "\u003c2.16.5",
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    "product_groups": [
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        "product_ids": [
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          "CSAFPID-31002",
          "CSAFPID-33001",
          "CSAFPID-33002"
        ],
        "summary": "Affected products."
      },
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          "CSAFPID-32002",
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      }
    ],
    "relationships": [
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        "category": "installed_on",
        "full_product_name": {
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          "product_id": "CSAFPID-31001"
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        "product_reference": "CSAFPID-22004",
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      },
      {
        "category": "installed_on",
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      },
      {
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      },
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    {
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      "cwe": {
        "id": "CWE-639",
        "name": "Authorization Bypass Through User-Controlled Key"
      },
      "notes": [
        {
          "audience": "all",
          "category": "description",
          "text": "An low privileged remote attacker in possession of the second factor for another user can login as that user without knowledge of the other user`s password.",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
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          "CSAFPID-32002"
        ],
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          "category": "vendor_fix",
          "details": "Update to latest version: 2.16.5",
          "group_ids": [
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          ]
        }
      ],
      "scores": [
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 7.5,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
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            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-31001",
            "CSAFPID-31002"
          ]
        }
      ],
      "title": "CVE-2025-3091"
    },
    {
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      "cwe": {
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        "name": "Observable Response Discrepancy"
      },
      "notes": [
        {
          "audience": "all",
          "category": "description",
          "text": "An unauthenticated remote attacker can enumerate valid user names from an unprotected endpoint.",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
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          "CSAFPID-34002"
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        ]
      },
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          "category": "vendor_fix",
          "details": "Update to latest version: 2.18.0",
          "group_ids": [
            "CSAFGID-0001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 7.5,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 7.5,
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
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            "CSAFPID-33002"
          ]
        }
      ],
      "title": "CVE-2025-3092"
    }
  ]
}


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  • 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.
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Detection rules are retrieved from Rulezet.