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CVE-2026-34370

Estado: AnalizadaMedia (6.5)—

Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the notebook module contains an Insecure Direct Object Reference (IDOR) vulnerability that allows any authenticated student to read the private course notes of any other user on the platform by manipulating the notebook_id parameter in the editnote action. The application fetches the note content using only the supplied integer ID without verifying that the requesting user owns the note, and the full title and HTML body are rendered in the edit form and returned to the attacker's browser.

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While ownership checks exist in the write paths (updateNote() and delete_note()), they are entirely absent from the read path (get_note_information()). This issue has been fixed in version 2.0.0-RC.3.

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)

Chamilo — Chamilo LMS

CWE

Referencias

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  "cveTags": [],
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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-04-15T18:57:17.887701Z"
        }
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          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
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      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "chamilo",
          "product": "chamilo-lms",
          "versions": [
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              "status": "affected",
              "version": "< 2.0.0-RC.3"
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  "published": "2026-04-14T22:16:31.340",
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    {
      "url": "https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3",
      "tags": [
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        "Release Notes"
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      "source": "security-advisories@github.com"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
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        {
          "lang": "en",
          "value": "CWE-639"
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    {
      "lang": "en",
      "value": "Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the notebook module contains an Insecure Direct Object Reference (IDOR) vulnerability that allows any authenticated student to read the private course notes of any other user on the platform by manipulating the notebook_id parameter in the editnote action. The application fetches the note content using only the supplied integer ID without verifying that the requesting user owns the note, and the full title and HTML body are rendered in the edit form and returned to the attacker's browser. While ownership checks exist in the write paths (updateNote() and delete_note()), they are entirely absent from the read path (get_note_information()). This issue has been fixed in version 2.0.0-RC.3."
    },
    {
      "lang": "es",
      "value": "Chamilo LMS es un sistema de gestión de aprendizaje de código abierto. En versiones anteriores a 2.0.0-RC.3, el módulo de cuaderno contiene una vulnerabilidad de Referencia Directa Insegura a Objeto (IDOR) que permite a cualquier estudiante autenticado leer las notas privadas del curso de cualquier otro usuario en la plataforma manipulando el parámetro notebook_id en la acción editnote. La aplicación obtiene el contenido de la nota utilizando solo el ID entero proporcionado sin verificar que el usuario solicitante sea el propietario de la nota, y el título completo y el cuerpo HTML se renderizan en el formulario de edición y se devuelven al navegador del atacante. Si bien existen comprobaciones de propiedad en las rutas de escritura (updateNote() y delete_note()), están completamente ausentes de la ruta de lectura (get_note_information()). Este problema ha sido solucionado en la versión 2.0.0-RC.3."
    }
  ],
  "lastModified": "2026-07-24T22:10:00.140",
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