Orchard 1.7.3-1.8.2 and 1.9.x < 1.9.1 - Stored Cross-Site Scripting via Username
Cross-site scripting (XSS) vulnerability in the Users module in Orchard 1.7.3 through 1.8.2 and 1.9.x before 1.9.1 allows remote attackers to inject arbitrary web script or HTML via the username when creating a new user account, which is not properly handled when deleting an account.