Cross Site Scripting vulnerability in InstantASP ltd, InstantForum.NET v.4.1.4 allows an attacker to execute arbitrary code via reflecting un-sanitized input from query string parameters directly into the HTML response without proper output encoding

Multiple cross-site scripting (XSS) vulnerabilities in InstantASP InstantForum.NET 4.1.3, 4.1.2, 4.1.1, 4.0.0, 4.1.0, and 3.4.0 allow remote attackers to inject arbitrary web script or HTML via the SessionID parameter to (1) Join.aspx or (2) Logon.aspx.