CVE-2026-33141: CWE-639: Authorization Bypass Through User-Controlled Key in chamilo chamilo-lms
Chamilo LMS is a learning management system. Prior to 2.0.0-RC.3, an Insecure Direct Object Reference (IDOR) vulnerability in the REST API stats endpoint allows any authenticated user (including low-privilege students with ROLE_USER) to read any other user's learning progress, certificates, and gradebook scores for any course, without enrollment or supervisory relationship. This vulnerability is fixed in 2.0.0-RC.3.
AI Analysis
Technical Summary
CVE-2026-33141 is an authorization bypass vulnerability (CWE-639) affecting Chamilo LMS before version 2.0.0-RC.3. The issue exists in the REST API stats endpoint, where insufficient access control allows authenticated users with ROLE_USER privileges to read sensitive information belonging to other users, such as learning progress, certificates, and gradebook scores, regardless of enrollment status or supervisory relationship. This vulnerability compromises confidentiality but does not affect integrity or availability. The vulnerability has a CVSS 3.1 base score of 6.5 (medium severity).
Potential Impact
An attacker with any authenticated user account can access sensitive educational data of other users without authorization. This leads to a confidentiality breach of personal learning records, certificates, and grades. There is no indication of impact on data integrity or system availability. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade Chamilo LMS to version 2.0.0-RC.3 or later, where this vulnerability is fixed. Since no official patch link or vendor advisory is provided, verify the upgrade path with the Chamilo project resources. Until upgraded, restrict access to the REST API stats endpoint or limit user privileges as a temporary measure.
CVE-2026-33141: CWE-639: Authorization Bypass Through User-Controlled Key in chamilo chamilo-lms
Description
Chamilo LMS is a learning management system. Prior to 2.0.0-RC.3, an Insecure Direct Object Reference (IDOR) vulnerability in the REST API stats endpoint allows any authenticated user (including low-privilege students with ROLE_USER) to read any other user's learning progress, certificates, and gradebook scores for any course, without enrollment or supervisory relationship. This vulnerability is fixed in 2.0.0-RC.3.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-33141 is an authorization bypass vulnerability (CWE-639) affecting Chamilo LMS before version 2.0.0-RC.3. The issue exists in the REST API stats endpoint, where insufficient access control allows authenticated users with ROLE_USER privileges to read sensitive information belonging to other users, such as learning progress, certificates, and gradebook scores, regardless of enrollment status or supervisory relationship. This vulnerability compromises confidentiality but does not affect integrity or availability. The vulnerability has a CVSS 3.1 base score of 6.5 (medium severity).
Potential Impact
An attacker with any authenticated user account can access sensitive educational data of other users without authorization. This leads to a confidentiality breach of personal learning records, certificates, and grades. There is no indication of impact on data integrity or system availability. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade Chamilo LMS to version 2.0.0-RC.3 or later, where this vulnerability is fixed. Since no official patch link or vendor advisory is provided, verify the upgrade path with the Chamilo project resources. Until upgraded, restrict access to the REST API stats endpoint or limit user privileges as a temporary measure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-17T20:35:49.929Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d93c061cc7ad14dada4d60
Added to database: 4/10/2026, 6:05:58 PM
Last enriched: 4/18/2026, 2:22:23 PM
Last updated: 5/25/2026, 9:37:46 AM
Views: 103
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