CVE-2026-33703: 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 (CVE-2026-33703) due to an insecure direct object reference in the /social-network/personal-data/{userId} endpoint. This flaw allows any authenticated user to access the full personal data and API tokens of other users by modifying the userId parameter. The vulnerability enables mass disclosure of sensitive user information and credentials, potentially leading to a full platform data breach. The issue is fixed in version 2. 0. 0-RC. 3.
AI Analysis
Technical Summary
CVE-2026-33703 is an authorization bypass vulnerability classified under CWE-639 affecting Chamilo LMS versions before 2.0.0-RC.3. The vulnerability arises from an insecure direct object reference in the endpoint /social-network/personal-data/{userId}, where the userId parameter is user-controlled and insufficiently validated. This allows authenticated users to retrieve personal data and API tokens of arbitrary users, resulting in unauthorized access to sensitive information. The vulnerability has a CVSS 4.0 base score of 7.1, indicating high severity. The vendor fixed this issue in version 2.0.0-RC.3.
Potential Impact
Exploitation of this vulnerability allows any authenticated user to access full personal data and API tokens of other users, leading to mass disclosure of sensitive information and credentials. This can result in a complete platform data breach, compromising user privacy and platform security.
Mitigation Recommendations
A fix for this vulnerability is available in Chamilo LMS version 2.0.0-RC.3. Users and administrators should upgrade to this version or later to remediate the issue. No additional mitigation guidance is provided by the vendor advisory. Patch status is not explicitly stated beyond the fixed version, so verify with the vendor for the latest remediation details.
CVE-2026-33703: 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 (CVE-2026-33703) due to an insecure direct object reference in the /social-network/personal-data/{userId} endpoint. This flaw allows any authenticated user to access the full personal data and API tokens of other users by modifying the userId parameter. The vulnerability enables mass disclosure of sensitive user information and credentials, potentially leading to a full platform data breach. The issue is fixed in version 2. 0. 0-RC. 3.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-33703 is an authorization bypass vulnerability classified under CWE-639 affecting Chamilo LMS versions before 2.0.0-RC.3. The vulnerability arises from an insecure direct object reference in the endpoint /social-network/personal-data/{userId}, where the userId parameter is user-controlled and insufficiently validated. This allows authenticated users to retrieve personal data and API tokens of arbitrary users, resulting in unauthorized access to sensitive information. The vulnerability has a CVSS 4.0 base score of 7.1, indicating high severity. The vendor fixed this issue in version 2.0.0-RC.3.
Potential Impact
Exploitation of this vulnerability allows any authenticated user to access full personal data and API tokens of other users, leading to mass disclosure of sensitive information and credentials. This can result in a complete platform data breach, compromising user privacy and platform security.
Mitigation Recommendations
A fix for this vulnerability is available in Chamilo LMS version 2.0.0-RC.3. Users and administrators should upgrade to this version or later to remediate the issue. No additional mitigation guidance is provided by the vendor advisory. Patch status is not explicitly stated beyond the fixed version, so verify with the vendor for the latest remediation details.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-23T17:06:05.746Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d943121cc7ad14dadcb1a2
Added to database: 4/10/2026, 6:36:02 PM
Last enriched: 4/10/2026, 6:50:52 PM
Last updated: 4/11/2026, 2:14:29 AM
Views: 7
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