CVE-2026-34602: CWE-639: Authorization Bypass Through User-Controlled Key in chamilo chamilo-lms
Chamilo LMS versions prior to 2. 0. 0-RC. 3 contain an authorization bypass vulnerability in the /api/course_rel_users endpoint. An authenticated attacker can manipulate the user parameter to enroll arbitrary users into courses without proper authorization. This occurs because the backend does not verify that the requester has permission to act on behalf of the specified user ID. The vulnerability allows unauthorized access to course materials and compromises enrollment controls. The issue is fixed in version 2. 0. 0-RC.
AI Analysis
Technical Summary
CVE-2026-34602 is an Insecure Direct Object Reference (IDOR) vulnerability in Chamilo LMS before version 2.0.0-RC.3. The /api/course_rel_users endpoint accepts a user parameter in the request body that is trusted without server-side verification of authorization. This allows an authenticated user to enroll any arbitrary user into any course, bypassing enrollment restrictions and potentially granting unauthorized access to course content. The vulnerability is classified under CWE-639 (Authorization Bypass Through User-Controlled Key).
Potential Impact
Exploitation of this vulnerability allows an authenticated attacker to bypass authorization controls and enroll arbitrary users into courses. This can lead to unauthorized access to course materials and compromise the integrity of the learning management system's enrollment process. The confidentiality and integrity of course data are impacted, but availability is not affected.
Mitigation Recommendations
This vulnerability is fixed in Chamilo LMS version 2.0.0-RC.3. Users should upgrade to this version or later to remediate the issue. Patch status is confirmed by the vendor advisory stating the fix is included in version 2.0.0-RC.3. No additional mitigation is required once upgraded.
CVE-2026-34602: CWE-639: Authorization Bypass Through User-Controlled Key in chamilo chamilo-lms
Description
Chamilo LMS versions prior to 2. 0. 0-RC. 3 contain an authorization bypass vulnerability in the /api/course_rel_users endpoint. An authenticated attacker can manipulate the user parameter to enroll arbitrary users into courses without proper authorization. This occurs because the backend does not verify that the requester has permission to act on behalf of the specified user ID. The vulnerability allows unauthorized access to course materials and compromises enrollment controls. The issue is fixed in version 2. 0. 0-RC.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-34602 is an Insecure Direct Object Reference (IDOR) vulnerability in Chamilo LMS before version 2.0.0-RC.3. The /api/course_rel_users endpoint accepts a user parameter in the request body that is trusted without server-side verification of authorization. This allows an authenticated user to enroll any arbitrary user into any course, bypassing enrollment restrictions and potentially granting unauthorized access to course content. The vulnerability is classified under CWE-639 (Authorization Bypass Through User-Controlled Key).
Potential Impact
Exploitation of this vulnerability allows an authenticated attacker to bypass authorization controls and enroll arbitrary users into courses. This can lead to unauthorized access to course materials and compromise the integrity of the learning management system's enrollment process. The confidentiality and integrity of course data are impacted, but availability is not affected.
Mitigation Recommendations
This vulnerability is fixed in Chamilo LMS version 2.0.0-RC.3. Users should upgrade to this version or later to remediate the issue. Patch status is confirmed by the vendor advisory stating the fix is included in version 2.0.0-RC.3. No additional mitigation is required once upgraded.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-30T17:15:52.500Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69deb5cc82d89c981f06f4c8
Added to database: 4/14/2026, 9:46:52 PM
Last enriched: 4/14/2026, 10:03:01 PM
Last updated: 4/14/2026, 11:05:19 PM
Views: 5
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