source: http://www.securityfocus.com/bid/52897/info

VBulletin is prone to an SQL-injection vulnerability because it fails to sufficiently sanitize user-supplied data before using it in an SQL query.

A successful exploit may allow an attacker to compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database.

VBulletin 4.1.10 is vulnerable; other versions may also be affected. 

http://www.example.com/announcement.php?a=&announcementid=[Sql]