GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

FKIE_CVE-2019-5456

Vulnerability from fkie_nvd - Published: 2019-07-30 21:15 - Updated: 2026-06-17 02:37
Severity
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
SMTP MITM refers to a malicious actor setting up an SMTP proxy server between the UniFi Controller version <= 5.10.21 and their actual SMTP server to record their SMTP credentials for malicious use later.
References
support@hackerone.comhttps://community.ui.com/releases/862b962b-55f6-4324-96be-610f647d5c1cRelease Notes, Vendor Advisory
support@hackerone.comhttps://community.ui.com/releases/9f698d0b-8279-40d3-9f1a-d36db4813124Release Notes, Vendor Advisory
support@hackerone.comhttps://community.ui.com/releases/Security-Advisory-Bulletin-003-003/982bbaa8-2a07-4f81-a5f6-0bb84753f391Vendor Advisory
support@hackerone.comhttps://hackerone.com/reports/519582Permissions Required
af854a3a-2127-422b-91ae-364da2661108https://community.ui.com/releases/862b962b-55f6-4324-96be-610f647d5c1cRelease Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://community.ui.com/releases/9f698d0b-8279-40d3-9f1a-d36db4813124Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://community.ui.com/releases/Security-Advisory-Bulletin-003-003/982bbaa8-2a07-4f81-a5f6-0bb84753f391Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/519582Permissions Required
Impacted products
Vendor Product Version
ui unifi_controller *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "UniFi",
          "vendor": "UniFi",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 5.10.21"
            }
          ]
        }
      ],
      "source": "support@hackerone.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ui:unifi_controller:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EFAB8C2E-16B2-476E-9D1D-F374426A7A04",
              "versionEndIncluding": "5.10.21",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "SMTP MITM refers to a malicious actor setting up an SMTP proxy server between the UniFi Controller version \u003c= 5.10.21 and their actual SMTP server to record their SMTP credentials for malicious use later."
    },
    {
      "lang": "es",
      "value": "Un MITM de SMTP se refiere a un actor malicioso que configura un servidor proxy SMTP entre la versi\u00f3n anterior a 5.10.21 (incluida) del controlador UniFi y su servidor SMTP actual, para registrar sus credenciales SMTP para un uso malicioso posterior."
    }
  ],
  "id": "CVE-2019-5456",
  "lastModified": "2026-06-17T02:37:43.277",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2019-07-30T21:15:12.037",
  "references": [
    {
      "source": "support@hackerone.com",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://community.ui.com/releases/862b962b-55f6-4324-96be-610f647d5c1c"
    },
    {
      "source": "support@hackerone.com",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://community.ui.com/releases/9f698d0b-8279-40d3-9f1a-d36db4813124"
    },
    {
      "source": "support@hackerone.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://community.ui.com/releases/Security-Advisory-Bulletin-003-003/982bbaa8-2a07-4f81-a5f6-0bb84753f391"
    },
    {
      "source": "support@hackerone.com",
      "tags": [
        "Permissions Required"
      ],
      "url": "https://hackerone.com/reports/519582"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://community.ui.com/releases/862b962b-55f6-4324-96be-610f647d5c1c"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://community.ui.com/releases/9f698d0b-8279-40d3-9f1a-d36db4813124"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://community.ui.com/releases/Security-Advisory-Bulletin-003-003/982bbaa8-2a07-4f81-a5f6-0bb84753f391"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Permissions Required"
      ],
      "url": "https://hackerone.com/reports/519582"
    }
  ],
  "sourceIdentifier": "support@hackerone.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-300"
        }
      ],
      "source": "support@hackerone.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-255"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.


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.