Mahara before 1.0.15, 1.1.x before 1.1.9, and 1.2.x before 1.2.5 has improper configuration options for authentication plugins associated with logins that use the single sign-on (SSO) functionality, which allows remote attackers to bypass authentication via an empty password. NOTE: some of these details are obtained from third party information.
Cross-site scripting (XSS) vulnerability in HTML Purifier before 4.1.1, as used in Mahara and other products, when the browser is Internet Explorer, allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.