Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Cross-site scripting (XSS) vulnerability in Mahara 1.4.x before 1.4.5 and 1.5.x before 1.5.4 allows remote attackers to inject arbitrary web script or HTML by uploading an XML file with the xhtml extension, which is rendered inline as script. NOTE: this can be leveraged with CVE-2012-2244 to execute arbitrary code without authentication, as demonstrated by modifying the clamav path.
CWE-79 - Cross Site Scripting
Cross-Site Scripting, commonly referred to as XSS, is the most dominant class of vulnerabilities. It allows an attacker to inject malicious code into a pregnable web application and victimize its users. The exploitation of such a weakness can cause severe issues such as account takeover, and sensitive data exfiltration. Because of the prevalence of XSS vulnerabilities and their high rate of exploitation, it has remained in the OWASP top 10 vulnerabilities for years.