The LAMS module (mod/lams) for Moodle 1.8 before 1.8.11 and 1.9 before 1.9.7 stores the (1) username, (2) firstname, and (3) lastname fields within the user table, which allows attackers to obtain user account information via unknown vectors.
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00751.html
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00730.html
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00704.html
http://www.vupen.com/english/advisories/2009/3455
http://www.securityfocus.com/bid/37244
http://secunia.com/advisories/37614
http://moodle.org/mod/forum/discuss.php?d=139102