Vulnerability Description
Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, an OS Command Injection vulnerability exists in the main/inc/ajax/gradebook.ajax.php endpoint within the export_all_certificates action, where the course code retrieved from the session variable $_SESSION['_cid'] via api_get_course_id() is concatenated directly into a shell_exec() command string without sanitization or escaping using escapeshellarg(). If an attacker can manipulate or poison their session data to inject shell metacharacters into the _cid variable, they can achieve arbitrary command execution on the underlying server. Successful exploitation grants full access to read system files and credentials, alters the application and database, or disrupts server availability. This issue has been fixed in version 2.0.0-RC.3.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Chamilo | Chamilo Lms | <= 1.11.38 |
Related Weaknesses (CWE)
References
- https://github.com/chamilo/chamilo-lms/commit/62671e5e268f235cddfba704edee90f35cPatch
- https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3ProductRelease Notes
- https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-crc6-r6c7-44q3ExploitVendor Advisory
FAQ
What is CVE-2026-35196?
CVE-2026-35196 is a vulnerability with a CVSS score of 8.8 (HIGH). Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, an OS Command Injection vulnerability exists in the main/inc/ajax/gradebook.ajax.php endpoint within the expo...
How severe is CVE-2026-35196?
CVE-2026-35196 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-35196?
Check the references section above for vendor advisories and patch information. Affected products include: Chamilo Chamilo Lms.