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.
Metrics
Affected Vendors & Products
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History
Wed, 15 Apr 2026 15:15:00 +0000
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ssvc
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Wed, 15 Apr 2026 14:00:00 +0000
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Chamilo
Chamilo chamilo Lms |
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Chamilo
Chamilo chamilo Lms |
Tue, 14 Apr 2026 21:15:00 +0000
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| 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. | |
| Title | Chamilo LMS: Unauthenticated SSRF via PENS Plugin allows attacker to probe internal network and reach cloud metadata services | |
| Weaknesses | CWE-306 CWE-918 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-04-14T21:09:36.832Z
Updated: 2026-04-15T14:26:33.592Z
Reserved: 2026-03-25T20:12:04.197Z
Link: CVE-2026-34160
Updated: 2026-04-15T14:26:17.479Z
Status : Received
Published: 2026-04-14T21:16:26.227
Modified: 2026-04-14T21:16:26.227
Link: CVE-2026-34160
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