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Vulnerability details

CVE-2026-40291

chamilo chamilo-lms

Chamilo LMS has Privilege Escalation via API User Role Modification

CVSS 3.1
8.8High

Official description

Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, an insecure direct object modification vulnerability in the PUT /api/users/{id} endpoint allows any authenticated user with ROLE_STUDENT to escalate their privileges to ROLE_ADMIN by modifying the roles field on their own user record. The API Platform security expression is_granted('EDIT', object) only verifies record ownership, and the roles field is included in the writable serialization group, enabling any user to set arbitrary roles such as ROLE_ADMIN. Successful exploitation grants full administrative control of the platform, including access to all courses, user data, grades, and administrative settings. This issue has been fixed in version 2.0.0-RC.3.

CVSS scores

ScoreVersionSourceVector
8.8High 3.1 CVEProject cvelistV5 (CNA) (GitHub_M) CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

VendorProductVersionsSource
chamilo chamilo-lms < 2.0-RC.3 CVEProject cvelistV5 (CNA)

References and advisories

2
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Details

Published
2026-04-15
Last updated
2026-04-15
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.31%
Probability of exploitation in 30 days
24.6%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-269
    Improper Privilege Management
  • CWE-863
    Incorrect Authorization