Moodle Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability - CVE-2013-4523
Cross-site scripting (XSS) vulnerability in message/lib.php in Moodle through 2.2.11 2.3.x before 2.3.10 2.4.x before 2.4.7 and 2.5.x before 2.5.3 allows remote authenticated users to inject arbitrary web script or HTML via a crafted message.