CVE-2026-27891

{
  "id": "CVE-2026-27891",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-27891",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-19T13:41:29.564991Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.2,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.2
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "NeoRazorX",
          "product": "facturascripts",
          "versions": [
            {
              "status": "affected",
              "version": "< 2026.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-18T22:16:38.370",
  "references": [
    {
      "url": "https://github.com/NeoRazorX/facturascripts/commit/2dda7c6f3b241fa84a0629166783720b882725fd",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/NeoRazorX/facturascripts/security/advisories/GHSA-3pgc-xqg9-cfr6",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/NeoRazorX/facturascripts/security/advisories/GHSA-3pgc-xqg9-cfr6",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        },
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "FacturaScripts is an open source accounting and invoicing software. Versions 2026 and below contain a critical vulnerability in the Plugins::add() function. The system fails to properly validate the file paths within uploaded ZIP archives. This allows an attacker to perform a Zip Slip attack, leading to Arbitrary File Write and Remote Code Execution (RCE) by overwriting sensitive .php files outside the designated plugins directory. The vulnerability is located in Plugins.php. While the testZipFile function attempts to validate that the ZIP contains only one root folder, it does not sanitize or validate the individual file paths within that folder. An attacker can bypass this check by naming a file ValidPluginName/../../shell.php. The explode function will see ValidPluginName as the root folder, satisfying the count($folders) != 1 check. However, during extraction, the ../../ sequence triggers a path traversal, allowing the file to be written anywhere the web server has permissions the root directory. This issue is fixed in version 2026.1."
    },
    {
      "lang": "es",
      "value": "FacturaScripts es un software de contabilidad y facturación de código abierto. Las versiones 2026 e inferiores contienen una vulnerabilidad crítica en la función Plugins::add(). El sistema no valida correctamente las rutas de archivo dentro de los archivos ZIP subidos. Esto permite a un atacante realizar un ataque Zip Slip, lo que lleva a la escritura arbitraria de archivos y a la ejecución remota de código (RCE) al sobrescribir archivos .php sensibles fuera del directorio de plugins designado. La vulnerabilidad se encuentra en Plugins.php. Aunque la función testZipFile intenta validar que el ZIP contiene solo una carpeta raíz, no sanitiza ni valida las rutas de archivo individuales dentro de esa carpeta. Un atacante puede eludir esta comprobación nombrando un archivo ValidPluginName/.. / ../shell.php. La función explode verá ValidPluginName como la carpeta raíz, satisfaciendo la comprobación count($folders) != 1. Sin embargo, durante la extracción, la secuencia .. / ../ desencadena un salto de ruta, permitiendo que el archivo se escriba en cualquier lugar donde el servidor web tenga permisos en el directorio raíz. Este problema se ha solucionado en la versión 2026.1."
    }
  ],
  "lastModified": "2026-07-24T13:10:00.223",
  "sourceIdentifier": "security-advisories@github.com"
}