7.1

CVE-2026-34602

Chamilo LMS: IDOR in /api/course_rel_users Allows Unauthorized Enrollment of Arbitrary Users into Courses

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Chamilo ≫ Chamilo Lms Version <= 1.11.38
Chamilo ≫ Chamilo Lms Version 2.0.0 Update alpha1
Chamilo ≫ Chamilo Lms Version 2.0.0 Update alpha2
Chamilo ≫ Chamilo Lms Version 2.0.0 Update alpha3
Chamilo ≫ Chamilo Lms Version 2.0.0 Update alpha4
Chamilo ≫ Chamilo Lms Version 2.0.0 Update alpha5
Chamilo ≫ Chamilo Lms Version 2.0.0 Update beta1
Chamilo ≫ Chamilo Lms Version 2.0.0 Update beta2
Chamilo ≫ Chamilo Lms Version 2.0.0 Update beta3
Chamilo ≫ Chamilo Lms Version 2.0.0 Update rc1
Chamilo ≫ Chamilo Lms Version 2.0.0 Update rc2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.2% 0.102
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 7.1 2.8 4.2
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
CWE-639 Authorization Bypass Through User-Controlled Key

The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

https://github.com/chamilo/chamilo-lms/commit/2a9f060fa9d50fc9a92ed93af774d2619642df92
Patch
https://github.com/chamilo/chamilo-lms/commit/bd2ba34c2e74475587e38c74c90c2934e69c8779
Patch
https://github.com/chamilo/chamilo-lms/commit/c9c30cdc48afae57cd6ab012ae2eceafd351a40e
Patch
https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3
Product
Release Notes
https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-x373-8j9j-g5pj
Vendor Advisory