SQL injection vulnerability in login.php in dwayner79 and Dominic Gamble Timesheet (aka Timesheet.php) 1.2.1 allows remote attackers to execute arbitrary SQL commands via the username parameter.
http://www.vupen.com/english/advisories/2006/3547
http://www.securityfocus.com/bid/19856
http://www.securityfocus.com/archive/1/445603/100/0/threaded
http://securityreason.com/securityalert/1542
http://secunia.com/advisories/21831
http://secaware.blogspot.com/2006/09/timesheet-121-blind-sql-injection.html