Multiple cross-site scripting (XSS) vulnerabilities in Mahara 1.4.x before 1.4.5 and 1.5.x before 1.5.4 and other versions including 1.2 allow remote attackers to inject arbitrary web script or HTML via a CSV header with \unknown fields \ which are not properly handled in error messages in the (1) bulk user (2) group and (3) group member upload capabilities. NOTE: this issue was originally part of CVE-2012-2243 but that ID was SPLIT due to different issues by different researchers.