Frappe is a full-stack web application framework. Prior to 14.99.14 and 15.94.0, an attacker could craft a malicious signup URL for a frappe site which could lead to an open redirect (or reflected XSS, depending on the crafted payload) when a user signs up. This vulnerability is fixed in 14.99.14 and 15.94.0.
CWE-79, CWE-601