source: http://www.securityfocus.com/bid/19235/info

X-Protection is prone to an SQL-injection vulnerability because it fails to properly sanitize user-supplied input before using it in an SQL query. 

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

X-Protection 1.10 is vulnerable to this issue.

POST:
username='/*&password=*/%20AND%201=0%20UNION%20SELECT%20999/*