CVE-2026-34370

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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 gesti\u00f3n de aprendizaje de c\u00f3digo abierto. En versiones anteriores a 2.0.0-RC.3, el m\u00f3dulo 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 par\u00e1metro notebook_id en la acci\u00f3n editnote. La aplicaci\u00f3n 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 t\u00edtulo completo y el cuerpo HTML se renderizan en el formulario de edici\u00f3n y se devuelven al navegador del atacante. Si bien existen comprobaciones de propiedad en las rutas de escritura (updateNote() y delete_note()), est\u00e1n completamente ausentes de la ruta de lectura (get_note_information()). Este problema ha sido solucionado en la versi\u00f3n 2.0.0-RC.3."}], "id": "CVE-2026-34370", "lastModified": "2026-07-24T22:10:00.140", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34370", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-15T18:57:17.887701Z", "version": "2.0.3"}}]}, "published": "2026-04-14T22:16:31.340", "references": [{"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-fm35-2hvw-564q"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-285"}, {"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.0.0-RC.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "chamilo-lms", "source": "cna", "vendor": "chamilo"}, "product": "chamilo_lms", "vendor": "chamilo"}], "analysis": {"en": {"generated_at": "2026-04-14T22:21:58.270012+00:00", "value": {"mitigation_remediation": ["Update Chamilo LMS to version 2.0.0\u2011RC.3 or later to enforce ownership checks on note retrieval.", "If an immediate upgrade is not possible, restrict or disable the notebook module for non\u2011admin roles, limiting editnote functionality to authorized users only.", "Review and strengthen access\u2011control checks in other modules to prevent similar IDOR vulnerabilities.", "Monitor audit logs for unexpected note\u2011access activity and alert on unauthorized views."], "summary": {"action": "Patch", "impact": "Unauthorized Data Disclosure"}, "threat_synthesis": {"affected_systems": "The vulnerability applies to Chamilo LMS releases preceding 2.0.0\u2011RC.3. The fix, which adds the necessary ownership checks to the read path, is available in that release. The product is distributed under the chamilo\u2011lms code base by chamilo.", "description_and_impact": "Chamilo LMS contains an insecure direct object reference that allows any authenticated student to read the private course notes of other users by manipulating the notebook_id parameter in the editnote action. The system retrieves note information using only the provided integer ID without checking that the requesting user owns the note, returning the full title and HTML body in the edit form. This grants the attacker full access to the note contents, exposing potentially sensitive academic data.", "risk_and_exploitability": "With a CVSS score of 6.5 the flaw is considered moderate, but it permits the leakage of confidential course notes. Exploitation requires only that the attacker be a logged\u2011in user, and no privileged escalation is needed. EPSS data is unavailable and the issue is not listed in the CISA KEV catalog, indicating no public exploits are known. Nevertheless, the ability to read arbitrary private notes constitutes a significant privacy risk that should be addressed promptly."}}}}, "created": "2026-04-15T13:48:23.624915+00:00", "updated": "2026-04-15T14:31:57.035295+00:00", "vendors": ["chamilo", "chamilo$PRODUCT$chamilo_lms"]}