URL Redirection to Untrusted Site ('Open Redirect')
BlogEngine.NET 22.214.171.124 allows a Client Side URL Redirect via the ReturnUrl parameter, related to BlogEngine/BlogEngine.Core/Services/Security/Security.cs, login.aspx, and register.aspx.
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.