Multiple cross-site scripting (XSS) vulnerabilities in ActiveCalendar 1.2.0 allow remote attackers to inject arbitrary web script or HTML via the css parameter to (1) flatevents.php, (2) js.php, (3) mysqlevents.php, (4) m_2.php, (5) m_3.php, (6) m_4.php, (7) xmlevents.php, (8) y_2.php, or (9) y_3.php in data/.