URL Redirection to Untrusted Site ('Open Redirect')
Silverstripe Framework is the Model-View-Controller framework that powers the Silverstripe content management system. In versions through 4.12.4, 4.13.0-beta1 through 4.13.0-rc1, and 5.0.0-alpha1 through 5.0.0-rc1, an attacker can display a link to a third party website on a login screen by convincing a legitimate content author to follow a specially crafted link.
CWE-601 - Open Redirect
An open redirect attack employs a URL parameter, HTML refresh tags, or a DOM based location change to exploit the trust of a vulnerable domain to direct the users to a malicious website. The attack could lead to higher severity vulnerabilities such as unauthorized access control, account takeover, XSS, and more.