CVE-2026-31940 Details
Description
Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, in main/lp/aicc_hacp.php, user-controlled request parameters are directly used to set the PHP session ID before loading global bootstrap. This leads to session fixation. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.
A session fixation vulnerability has been identified in Chamilo LMS versions prior to 1.11.38 and 2.0.0-RC.3. The issue arises in the AICC HACP endpoint, where user-controlled request parameters are directly used to set the PHP session ID before the global bootstrap is loaded. This allows an attacker to predefine a session ID and potentially hijack a user's session, leading to account takeover.
Users can upgrade to Chamilo LMS versions 1.11.38 or 2.0.0-RC.3, where this vulnerability has been patched. For those unable to upgrade, it's recommended to disable AICC support functionality.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 14, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-384 | Session Fixation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| chamilo chamilo lms | < 1.11.38 2.0.0 alpha1 2.0.0 alpha2 2.0.0 alpha3 2.0.0 alpha4 2.0.0 alpha5 2.0.0 beta1 2.0.0 beta2 2.0.0 beta3 2.0.0 rc1 2.0.0 rc2 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 17, 2026 | Initial Analysis | [email protected] |
| Apr 10, 2026 | New CVE Received | [email protected] |