CVE-2026-34602

{"id": "CVE-2026-34602", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34602", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-15T13:32:25.460091Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 4.2, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "chamilo", "product": "chamilo-lms", "versions": [{"status": "affected", "version": "< 2.0.0-RC.3"}]}]}], "published": "2026-04-14T22:16:31.500", "references": [{"url": "https://github.com/chamilo/chamilo-lms/commit/2a9f060fa9d50fc9a92ed93af774d2619642df92", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/chamilo/chamilo-lms/commit/bd2ba34c2e74475587e38c74c90c2934e69c8779", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/chamilo/chamilo-lms/commit/c9c30cdc48afae57cd6ab012ae2eceafd351a40e", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-x373-8j9j-g5pj", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-639"}]}], "descriptions": [{"lang": "en", "value": "Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the /api/course_rel_users endpoint is vulnerable to Insecure Direct Object Reference (IDOR), allowing an authenticated attacker to modify the user parameter in the request body to enroll any arbitrary user into any course without proper authorization checks. The backend trusts the user-supplied input for the user field and performs no server-side verification that the requester owns the referenced user ID or has permission to act on behalf of other users. This enables unauthorized manipulation of user-course relationships, potentially granting unintended access to course materials, bypassing enrollment controls, and compromising platform integrity. 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 la 2.0.0-RC.3, el endpoint /API/course_rel_users es vulnerable a la Referencia Directa Insegura a Objeto (IDOR), permitiendo a un atacante autenticado modificar el par\u00e1metro user en el cuerpo de la solicitud para inscribir a cualquier usuario arbitrario en cualquier curso sin las comprobaciones de autorizaci\u00f3n adecuadas. El backend conf\u00eda en la entrada proporcionada por el usuario para el campo user y no realiza ninguna verificaci\u00f3n del lado del servidor de que el solicitante posee el ID de usuario referenciado o tiene permiso para actuar en nombre de otros usuarios. Esto permite la manipulaci\u00f3n no autorizada de las relaciones usuario-curso, lo que podr\u00eda conceder acceso no intencionado a los materiales del curso, eludir los controles de inscripci\u00f3n y comprometer la integridad de la plataforma. Este problema ha sido solucionado en la versi\u00f3n 2.0.0-RC.3."}], "lastModified": "2026-07-24T22:10:00.140", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "34085140-9203-4B20-9036-743718F1A4F8", "versionEndIncluding": "1.11.38"}, {"criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AF7661F-C1F7-4CAB-BBDF-FC5BF7F5BEB8"}, {"criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FE56AF71-9D53-42C6-980D-09E1C418ED87"}, {"criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "01195674-9E1A-4C07-B7D3-0F0CC2E6511B"}, {"criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BAE63449-5A56-4302-A4BF-F3D19FC96A80"}, {"criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A84A06F9-5AB7-4703-8153-33AC68882B95"}, {"criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B91302A3-53DE-4ED0-BAAB-FE9DA03F8242"}, {"criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "46008D4A-96F7-4E04-8256-E115AAAE3383"}, {"criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6E2BCAFF-D44B-4E67-998A-DF855E27606B"}, {"criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D2E7D018-E4C2-45F5-8D9A-DAC947173607"}, {"criteria": "cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DAF96697-6B6D-459D-9510-E5CEEDC2859B"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}