URL Redirection to Untrusted Site ('Open Redirect')
Open Redirect vulnerability in tornado versions prior to 6.3.2, allows an unauthenticated remote attacker to redirect a user to an arbitrary website and conduct a phishing attack by having the user access a specially crafted URL.
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.