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CVE-2023-44763

Estado: ModificadaMedia (5.4)—💥 PoC

Concrete CMS v9.2.1 is affected by an Arbitrary File Upload vulnerability via a Thumbnail file upload, which allows Cross-Site Scripting (XSS). NOTE: the vendor's position is that a customer is supposed to know that "pdf" should be excluded from the allowed file types, even though pdf is one of the allowed file types in the default configuration.

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).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (1)

Concretecms — Concrete CMS

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-44763",
  "cveTags": [
    {
      "tags": [
        "disputed"
      ],
      "sourceIdentifier": "cve@mitre.org"
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  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.4,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
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      }
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  "affected": [
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      "affectedData": [
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          "vendor": "n/a",
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  "published": "2023-10-10T12:15:09.870",
  "references": [
    {
      "url": "https://github.com/sromanhu/ConcreteCMS-Arbitrary-file-upload-Thumbnail",
      "tags": [
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        "Third Party Advisory"
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      "source": "cve@mitre.org"
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      "url": "https://web.archive.org/web/20231026034159/https://documentation.concretecms.org/user-guide/editors-reference/dashboard/system-and-maintenance/files/allowed-file-types",
      "source": "cve@mitre.org"
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      "source": "cve@mitre.org"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-434"
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  "descriptions": [
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      "lang": "en",
      "value": "Concrete CMS v9.2.1 is affected by an Arbitrary File Upload vulnerability via a Thumbnail file upload, which allows Cross-Site Scripting (XSS). NOTE: the vendor's position is that a customer is supposed to know that \"pdf\" should be excluded from the allowed file types, even though pdf is one of the allowed file types in the default configuration."
    },
    {
      "lang": "es",
      "value": "** EN DISPUTA ** Concrete CMS v9.2.1 se ve afectado por una vulnerabilidad de carga arbitraria de archivos mediante la carga de un archivo en miniatura, que permite Cross-Site Scripting (XSS). NOTA: la posición del proveedor es que se supone que el cliente debe saber que \"pdf\" debe excluirse de los tipos de archivos permitidos, aunque pdf sea uno de los tipos de archivos permitidos en la configuración predeterminada."
    }
  ],
  "lastModified": "2026-06-17T06:27:46.887",
  "configurations": [
    {
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        {
          "negate": false,
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          "operator": "OR"
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  "sourceIdentifier": "cve@mitre.org"
}