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CVE-2020-15159

Estado: ModificadaAlta (7.6)—

baserCMS versiones 4.3.6 y anteriores, esta afectado por una vulnerabilidad de tipo Cross Site Scripting (XSS) y Remote Code Execution (RCE). Esta puede ser ejecutada al iniciar sesión como administrador del sistema y cargando un archivo de script ejecutable tal y como un archivo PHP. Los componentes afectados son los archivos ThemeFilesController.php y UploaderFilesController.php. Esto es corregido en la versión 4.3.7

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)

Basercms — Basercms

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-15159",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.6,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:H/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "HIGH",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 7.6,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
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      },
      {
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        "cvssData": {
          "scope": "CHANGED",
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
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          "integrityImpact": "HIGH",
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          "attackComplexity": "HIGH",
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          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
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        "impactScore": 6,
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  "affected": [
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      "affectedData": [
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          "vendor": "baserproject",
          "product": "basercms",
          "versions": [
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              "version": "unspecified",
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              "versionType": "custom"
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  ],
  "published": "2020-08-28T22:15:10.657",
  "references": [
    {
      "url": "https://basercms.net/security/20200827",
      "tags": [
        "Vendor Advisory"
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      "source": "security-advisories@github.com"
    },
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      "url": "https://github.com/baserproject/basercms/commit/16a7b3cd09a0ca355474119c76897eac2034a66d",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
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    {
      "url": "https://github.com/baserproject/basercms/security/advisories/GHSA-673x-f5wx-fxpw",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
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    {
      "url": "https://basercms.net/security/20200827",
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    },
    {
      "url": "https://github.com/baserproject/basercms/commit/16a7b3cd09a0ca355474119c76897eac2034a66d",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
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    {
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      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "baserCMS 4.3.6 and earlier is affected by Cross Site Scripting (XSS) and Remote Code Execution (RCE). This may be executed by logging in as a system administrator and uploading an executable script file such as a PHP file.The affected components are ThemeFilesController.php and UploaderFilesController.php. This is fixed in version 4.3.7."
    },
    {
      "lang": "es",
      "value": "baserCMS versiones 4.3.6 y anteriores, esta afectado por una vulnerabilidad de tipo Cross Site Scripting (XSS) y Remote Code Execution (RCE). Esta puede ser ejecutada al iniciar sesión como administrador del sistema y cargando un archivo de script ejecutable tal y como un archivo PHP. Los componentes afectados son los archivos ThemeFilesController.php y UploaderFilesController.php. Esto es corregido en la versión 4.3.7"
    }
  ],
  "lastModified": "2026-06-17T02:56:10.110",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3D8C0605-796C-4AA8-ACD8-1444D95A121B",
              "versionEndIncluding": "4.3.6"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}