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CVE-2021-26804

Estado: ModificadaMedia (6.5)—

Insecure Permissions in Centreon Web versions 19.10.18, 20.04.8, and 20.10.2 allows remote attackers to bypass validation by changing any file extension to ".gif", then uploading it in the "Administration/ Parameters/ Images" section of the application.

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)

Centreon — Centreon WEB

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-26804",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-05-04T17:15:07.627",
  "references": [
    {
      "url": "https://medium.com/%40pedro.ferreira.phf/vulnerability-affecting-some-versions-of-centreon-2b34bd6dc621",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://medium.com/%40pedro.ferreira.phf/vulnerability-affecting-some-versions-of-centreon-2b34bd6dc621",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-276"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Insecure Permissions in Centreon Web versions 19.10.18, 20.04.8, and 20.10.2 allows remote attackers to bypass validation by changing any file extension to \".gif\", then uploading it in the \"Administration/ Parameters/ Images\" section of the application."
    },
    {
      "lang": "es",
      "value": "Los permisos no seguros en Centreon Web versiones 19.10.18, 20.04.8 y 20.10.2, permiten a atacantes remotos omitir la comprobación al cambiar cualquier extensión de archivo a \".gif\" y luego cargándola en la sección de la aplicación \"Administration/ Parameters/ Images\""
    }
  ],
  "lastModified": "2026-06-17T03:43:48.297",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:centreon:centreon_web:19.10.18:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A5C8D069-02D8-4FF2-9F42-B665EF576040"
            },
            {
              "criteria": "cpe:2.3:a:centreon:centreon_web:20.04.8:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "21174697-5045-44A8-935E-D80C3ABE0E48"
            },
            {
              "criteria": "cpe:2.3:a:centreon:centreon_web:20.10.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FA252808-DB35-4D56-AACF-EEB2C76BDB01"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}