Server-Side Request Forgery (SSRF)
The Recurly Client Ruby Library 2.0.x before 2.0.13, 2.1.x before 2.1.11, 2.2.x before 2.2.5, 2.3.x before 2.3.10, 2.4.x before 2.4.11, 2.5.x before 2.5.4, 2.6.x before 2.6.3, 2.7.x before 2.7.8, 2.8.x before 2.8.2, 2.9.x before 2.9.2, 2.10.x before 2.10.4, and 2.11.x before 2.11.3, is vulnerable to a Server-Side Request Forgery vulnerability in the "Resource#find" method that could result in compromise of API keys or other critical resources.
CWE-918 - Server-Side Request Forgery (SSRF)
Server-side request forgery (SSRF) is a weakness that allows an attacker to send an arbitrary request, making it appear that the request was sent by the server. This request may bypass a firewall that would normally prevent direct access to the URL. The impact of this vulnerability can vary from unauthorized access to files and sensitive information to remote code execution.