CVE-2026-33702: CWE-639: Authorization Bypass Through User-Controlled Key in chamilo chamilo-lms
Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, Chamilo LMS contains an Insecure Direct Object Reference (IDOR) vulnerability in the Learning Path progress saving endpoint. The file lp_ajax_save_item.php accepts a uid (user ID) parameter directly from $_REQUEST and uses it to load and modify another user's Learning Path progress — including score, status, completion, and time — without verifying that the requesting user matches the target user ID. Any authenticated user enrolled in a course can overwrite another user's Learning Path progress by simply changing the uid parameter in the request. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.
AI Analysis
Technical Summary
CVE-2026-33702 is an Insecure Direct Object Reference (IDOR) vulnerability in Chamilo LMS's lp_ajax_save_item.php endpoint. The endpoint accepts a uid parameter from user input and uses it to load and modify another user's Learning Path progress without verifying that the requesting user is authorized to do so. This allows any authenticated user enrolled in a course to overwrite another user's progress data, including score, status, completion, and time. The vulnerability affects Chamilo LMS versions prior to 1.11.38 and versions from 2.0.0-alpha.1 up to but not including 2.0.0-RC.3. The vulnerability is addressed in versions 1.11.38 and 2.0.0-RC.3.
Potential Impact
An authenticated user enrolled in a course can modify another user's Learning Path progress data, impacting the integrity of user progress records. This could affect course completion status and scoring, potentially undermining trust in the LMS's tracking and reporting functions. There is no indication of confidentiality or availability impact. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade Chamilo LMS to version 1.11.38 or later, or to 2.0.0-RC.3 or later, where this vulnerability is fixed. Patch status is not explicitly stated as 'official-fix' but the description confirms the issue is resolved in these versions. Until upgraded, restrict access to the affected endpoint or implement additional authorization checks if possible.
CVE-2026-33702: CWE-639: Authorization Bypass Through User-Controlled Key in chamilo chamilo-lms
Description
Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, Chamilo LMS contains an Insecure Direct Object Reference (IDOR) vulnerability in the Learning Path progress saving endpoint. The file lp_ajax_save_item.php accepts a uid (user ID) parameter directly from $_REQUEST and uses it to load and modify another user's Learning Path progress — including score, status, completion, and time — without verifying that the requesting user matches the target user ID. Any authenticated user enrolled in a course can overwrite another user's Learning Path progress by simply changing the uid parameter in the request. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-33702 is an Insecure Direct Object Reference (IDOR) vulnerability in Chamilo LMS's lp_ajax_save_item.php endpoint. The endpoint accepts a uid parameter from user input and uses it to load and modify another user's Learning Path progress without verifying that the requesting user is authorized to do so. This allows any authenticated user enrolled in a course to overwrite another user's progress data, including score, status, completion, and time. The vulnerability affects Chamilo LMS versions prior to 1.11.38 and versions from 2.0.0-alpha.1 up to but not including 2.0.0-RC.3. The vulnerability is addressed in versions 1.11.38 and 2.0.0-RC.3.
Potential Impact
An authenticated user enrolled in a course can modify another user's Learning Path progress data, impacting the integrity of user progress records. This could affect course completion status and scoring, potentially undermining trust in the LMS's tracking and reporting functions. There is no indication of confidentiality or availability impact. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade Chamilo LMS to version 1.11.38 or later, or to 2.0.0-RC.3 or later, where this vulnerability is fixed. Patch status is not explicitly stated as 'official-fix' but the description confirms the issue is resolved in these versions. Until upgraded, restrict access to the affected endpoint or implement additional authorization checks if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-23T17:06:05.746Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d943121cc7ad14dadcb19d
Added to database: 4/10/2026, 6:36:02 PM
Last enriched: 4/10/2026, 6:50:57 PM
Last updated: 4/11/2026, 6:03:15 AM
Views: 8
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