{
  "id": "CVE-2021-38346",
  "sourceIdentifier": "security@wordfence.com",
  "published": "2021-10-14T16:15:09.317",
  "lastModified": "2022-07-05T15:03:03.593",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "The Brizy Page Builder plugin <= 2.3.11 for WordPress allowed authenticated users to upload executable files to a location of their choice using the brizy_create_block_screenshot AJAX action. The file would be named using the id parameter, which could be prepended with \"../\" to perform directory traversal, and the file contents were populated via the ibsf parameter, which would be base64-decoded and written to the file. While the plugin added a .jpg extension to all uploaded filenames, a double extension attack was still possible, e.g. a file named shell.php would be saved as shell.php.jpg, and would be executable on a number of common configurations."
    },
    {
      "lang": "es",
      "value": "El plugin Brizy Page Builder versiones anteriores a 2.3.11 incluy\u00e9ndola, para WordPress permit\u00eda a usuarios autenticados subir archivos ejecutables a una ubicaci\u00f3n de su elecci\u00f3n usando la acci\u00f3n  brizy_create_block_screenshot AJAX. El archivo se nombraba por medio del par\u00e1metro id, al que se le pod\u00eda a\u00f1adir \"../\" para llevar a cabo un salto de directorio, y el contenido del archivo se rellenaba por medio del par\u00e1metro ibsf, que se decodificaba en base64 y se escrib\u00eda en el archivo. Mientras el plugin a\u00f1ad\u00eda una extensi\u00f3n .jpg a todos los nombres de archivos subidos, todav\u00eda era posible un ataque de doble extensi\u00f3n, por ejemplo, un archivo llamado shell.php se guardar\u00eda como shell.php.jpg, y ser\u00eda ejecutable en un n\u00famero de configuraciones comunes"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "security@wordfence.com",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "SINGLE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "PARTIAL",
          "baseScore": 6.5
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.0,
        "impactScore": 6.4,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    },
    {
      "source": "security@wordfence.com",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:brizy:brizy-page_builder:*:*:*:*:*:*:*:*",
              "versionEndIncluding": "2.3.11",
              "matchCriteriaId": "C921466C-0150-4222-BE35-4B60C4590047"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://www.wordfence.com/blog/2021/10/multiple-vulnerabilities-in-brizy-page-builder-plugin-allow-site-takeover/",
      "source": "security@wordfence.com",
      "tags": [
        "Third Party Advisory"
      ]
    }
  ]
}