Missing permission check in Jenkins RocketChat Notifier Plugin

Jenkins RocketChat Notifier Plugin 1.4.10 and earlier does not perform a permission check in a method implementing form validation.

This allows attackers with Overall/Read permission to connect to an attacker-specified URL using attacker-specified credentials.

Additionally, this form validation method does not require POST requests, resulting in a cross-site request forgery (CSRF) vulnerability.

RocketChat Notifier Plugin 1.5.0 requires POST requests and Overall/Administer permission for the affected form validation method.