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CVE-2019-20859

Estado: ModificadaAlta (7.5)—

Se detectó un problema en Mattermost Server versiones anteriores a 5.15.0. El control de acceso de inicio de sesión puede ser omitido por medio de una entrada diseñada

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 (1)

Mattermost — Mattermost Server

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2019-20859",
  "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": "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": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-06-19T15:15:10.680",
  "references": [
    {
      "url": "https://mattermost.com/security-updates/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://mattermost.com/security-updates/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in Mattermost Server before 5.15.0. Login access control can be bypassed via crafted input."
    },
    {
      "lang": "es",
      "value": "Se detectó un problema en Mattermost Server versiones anteriores a 5.15.0. El control de acceso de inicio de sesión puede ser omitido por medio de una entrada diseñada"
    }
  ],
  "lastModified": "2026-06-17T02:31:19.930",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "622E94AF-4BC7-42D4-B750-F72EECB98C8A",
              "versionEndExcluding": "4.10.8"
            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "93D446DC-CA4C-4C09-80DA-525D91E2EA36",
              "versionEndExcluding": "5.7.3",
              "versionStartIncluding": "5.7.0"
            },
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
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              "versionEndExcluding": "5.8.1",
              "versionStartIncluding": "5.8.0"
            },
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost_server:5.9.0:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B769FC2A-E54F-4C2C-A42B-3FC78B90F4EE"
            },
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              "vulnerable": true,
              "matchCriteriaId": "49479373-44B5-4CFF-9F92-44534F99CED6"
            },
            {
              "criteria": "cpe:2.3:a:mattermost:mattermost_server:5.9.0:rc3:*:*:*:*:*:*",
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            },
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              "matchCriteriaId": "FF4140FA-6A46-4307-B78D-1A0A6C73B0A5"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}