8.6

CVE-2026-34160

Chamilo LMS: Unauthenticated SSRF via PENS Plugin allows attacker to probe internal network and reach cloud metadata services

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Chamilo ≫ Chamilo Lms Version <= 1.11.38
Chamilo ≫ Chamilo Lms Version2.0.0 Updatealpha1
Chamilo ≫ Chamilo Lms Version2.0.0 Updatealpha2
Chamilo ≫ Chamilo Lms Version2.0.0 Updatealpha3
Chamilo ≫ Chamilo Lms Version2.0.0 Updatealpha4
Chamilo ≫ Chamilo Lms Version2.0.0 Updatealpha5
Chamilo ≫ Chamilo Lms Version2.0.0 Updatebeta1
Chamilo ≫ Chamilo Lms Version2.0.0 Updatebeta2
Chamilo ≫ Chamilo Lms Version2.0.0 Updatebeta3
Chamilo ≫ Chamilo Lms Version2.0.0 Updaterc1
Chamilo ≫ Chamilo Lms Version2.0.0 Updaterc2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.34% 0.26
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 8.6 3.9 4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CWE-306 Missing Authentication for Critical Function

The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

CWE-918 Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3
Product
Release Notes
https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-g2xj-4cch-j276
Vendor Advisory
https://github.com/chamilo/chamilo-lms/commit/de4058d76fac2413afd023b1ec942e8e79579011
Patch