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TI-2026-29073 Aliases CVE-2026-40291

Chamilo LMS has Privilege Escalation via API User Role Modification

Priority MEDIUM 40CWE-269Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation, Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-269 and CWE-863.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00316 24th percentileScored 2026-11-07
Fix Fixed chamilo-lms (chamilo): 2.0-RC.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
chamilochamilo-lmsbefore 2.0-RC.32.0-RC.3Patch availableCNA
  • chamilo-lms Vendorchamilo Affected before 2.0-RC.3 Fixed in 2.0-RC.3 Patch available CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*up to 1.11.38Vulnerablechamilo
cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha1:*:*:*:*:*:*2.0.0 alpha1Vulnerablechamilo
cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha2:*:*:*:*:*:*2.0.0 alpha2Vulnerablechamilo
cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha3:*:*:*:*:*:*2.0.0 alpha3Vulnerablechamilo
cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha4:*:*:*:*:*:*2.0.0 alpha4Vulnerablechamilo
cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha5:*:*:*:*:*:*2.0.0 alpha5Vulnerablechamilo
cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta1:*:*:*:*:*:*2.0.0 beta1Vulnerablechamilo
cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta2:*:*:*:*:*:*2.0.0 beta2Vulnerablechamilo
cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta3:*:*:*:*:*:*2.0.0 beta3Vulnerablechamilo
cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc1:*:*:*:*:*:*2.0.0 rc1Vulnerablechamilo
  • cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:* Versions up to 1.11.38 Vulnerable ·chamilo
  • cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha1:*:*:*:*:*:* Versions 2.0.0 alpha1 Vulnerable ·chamilo
  • cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha2:*:*:*:*:*:* Versions 2.0.0 alpha2 Vulnerable ·chamilo
  • cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha3:*:*:*:*:*:* Versions 2.0.0 alpha3 Vulnerable ·chamilo
  • cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha4:*:*:*:*:*:* Versions 2.0.0 alpha4 Vulnerable ·chamilo
  • cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha5:*:*:*:*:*:* Versions 2.0.0 alpha5 Vulnerable ·chamilo
  • cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta1:*:*:*:*:*:* Versions 2.0.0 beta1 Vulnerable ·chamilo
  • cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta2:*:*:*:*:*:* Versions 2.0.0 beta2 Vulnerable ·chamilo
  • cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta3:*:*:*:*:*:* Versions 2.0.0 beta3 Vulnerable ·chamilo
  • cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc1:*:*:*:*:*:* Versions 2.0.0 rc1 Vulnerable ·chamilo
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc2:*:*:*:*:*:*2.0.0 rc2Vulnerablechamilo
  • cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc2:*:*:*:*:*:* Versions 2.0.0 rc2 Vulnerable ·chamilo

Remediation

  • Fix · CNA chamilo-lms (chamilo) Fixed in 2.0-RC.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40291

References

Advisory 1

Other 1

  • TI-2025-32070 Chamilo: Evaluation of untrusted user input leads to Remote Code Execution CVSS 3.1CRITICAL 9.8
  • TI-2025-32081 Deserialization of untrusted data in chamilo-lms CVSS 4.0HIGH 8.8
  • TI-2024-32140 Chamilo: Post-Auth Remote Code Execution CVSS 4.0HIGH 8.7
  • TI-2023-03907 Chamilo LMS Unauthenticated Big Upload File Remote Code Execution CVSS 3.1HIGH 8.1
  • TI-2025-32595 Chamilo: Stored XSS Vulnerability via CSV User Import CVSS 3.1HIGH 8.8
  • TI-2024-20321 Chamilo LMS 1.11.26 is vulnerable to Incorrect Access Control via main/auth/profile. CVSS 3.1HIGH 8.8
See all 121 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences