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CVE-2026-34602

HIGH

7.1

Description

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.

Details CVE

Score CVSS v3.17.1

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie4/14/2026

Derniere modification4/14/2026

Sourcenvd

Observations honeypot0

Faiblesses (CWE)

CWE-639

References

https://github.com/chamilo/chamilo-lms/commit/2a9f060fa9d50fc9a92ed93af774d2619642df92(security-advisories@github.com)

https://github.com/chamilo/chamilo-lms/commit/bd2ba34c2e74475587e38c74c90c2934e69c8779(security-advisories@github.com)

https://github.com/chamilo/chamilo-lms/commit/c9c30cdc48afae57cd6ab012ae2eceafd351a40e(security-advisories@github.com)

https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3(security-advisories@github.com)

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-x373-8j9j-g5pj(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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