Laravel-Mediable before 7.0.0 contains a server-side request forgery vulnerability that allows remote attackers to issue arbitrary HTTP requests from the server by supplying unvalidated caller-controlled URLs to endpoints backed by MediaUploader::fromSource(). Attackers can craft URLs targeting RFC-1918 addresses, loopback interfaces, cloud metadata endpoints, or file:// URIs through RemoteUrlAdapter to reach internal infrastructure, retrieve sensitive files, and exfiltrate cloud credentials such as IAM tokens from instance metadata services.