Vulnerability Description
Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the PENS (Package Exchange Notification Services) plugin endpoint at public/plugin/Pens/pens.php is accessible without authentication and accepts a user-controlled package-url parameter that the server fetches using curl without filtering private or internal IP addresses, enabling unauthenticated Server-Side Request Forgery (SSRF). An attacker can exploit this to probe internal network services, access cloud metadata endpoints (such as 169.254.169.254) to steal IAM credentials and sensitive instance metadata, or trigger state-changing operations on internal services via the receipt and alerts callback parameters. No authentication is required to exploit either SSRF vector, significantly increasing the attack surface. 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/de4058d76fac2413afd023b1ec942e8e79Patch
- https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3ProductRelease Notes
- https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-g2xj-4cch-j276Vendor Advisory
FAQ
What is CVE-2026-34160?
CVE-2026-34160 is a vulnerability with a CVSS score of 8.6 (HIGH). Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the PENS (Package Exchange Notification Services) plugin endpoint at public/plugin/Pens/pens.php is accessibl...
How severe is CVE-2026-34160?
CVE-2026-34160 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34160?
Check the references section above for vendor advisories and patch information. Affected products include: Chamilo Chamilo Lms.