Chamilo is a learning management system. Prior to version 1.11.28, the OpenId function allows anyone to send requests to any URL on server's behalf, which results in unauthenticated blind SSRF. This issue has been patched in version 1.11.28.
A Server-Side Request Forgery (SSRF) in Chamilo LMS v1.11.13 allows attackers to enumerate the internal network and execute arbitrary system commands via a crafted Phar file.
An issue in Chamilo v1.11.* up to v1.11.18 allows attackers to execute a Server-Side Request Forgery (SSRF) and obtain information on the services running on the server via crafted requests in the social and links tools.