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CVE-2025-57520

Estado: AnalizadaMedia (6.1)—

A Cross Site Scripting (XSS) vulnerability exists in Decap CMS thru 3.8.3. Input fields such as body, tags, title, and description are not properly sanitized before being rendered in the content preview pane. This enables an attacker to inject arbitrary JavaScript which executes whenever a user views the preview panel. The vulnerability affects multiple input vectors and does not require user interaction beyond viewing the affected content.

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)

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-57520",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-57520",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-09-11T18:22:54.365589Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
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          "scope": "CHANGED",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
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  "affected": [
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        {
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          "versions": [
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  "published": "2025-09-10T17:15:33.537",
  "references": [
    {
      "url": "https://github.com/decaporg/decap-cms",
      "tags": [
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://onurcangenc.com.tr/blog/decap-cms-xss-analysis",
      "tags": [
        "Broken Link"
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      "source": "cve@mitre.org"
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    {
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  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
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  "descriptions": [
    {
      "lang": "en",
      "value": "A Cross Site Scripting (XSS) vulnerability exists in Decap CMS thru 3.8.3. Input fields such as body, tags, title, and description are not properly sanitized before being rendered in the content preview pane. This enables an attacker to inject arbitrary JavaScript which executes whenever a user views the preview panel. The vulnerability affects multiple input vectors and does not require user interaction beyond viewing the affected content."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad de Cross Site Scripting (XSS) en Decap CMS hasta la versión 3.8.3. Los campos de entrada como cuerpo, etiquetas, título y descripción no se sanean correctamente antes de ser renderizados en el panel de vista previa del contenido. Esto permite a un atacante inyectar JavaScript arbitrario que se ejecuta cada vez que un usuario ve el panel de vista previa. La vulnerabilidad afecta a múltiples vectores de entrada y no requiere interacción del usuario más allá de ver el contenido afectado."
    }
  ],
  "lastModified": "2026-06-17T09:43:10.303",
  "configurations": [
    {
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              "versionEndIncluding": "3.8.3"
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  "sourceIdentifier": "cve@mitre.org"
}