Open redirect vulnerability in the AbstractAuthenticationFormServlet in the Auth Core (org.apache.sling.auth.core) bundle before 1.1.4 in Apache Sling allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the resource parameter, related to "a custom login form and XSS."
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.