Description
WordPress is prone to an SQL injection vulnerability because the application fails to properly sanitize user-supplied input before using it in an SQL query. Exploiting this issue could allow an attacker to compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database implementation. WordPress versions prior to 1.5.1.2 are vulnerable.
Remediation
Update to WordPress version 1.5.1.2 or latest
References
http://www.securityfocus.com/bid/13809/exploit
http://www.securityfocus.com/archive/1/401672
http://packetstormsecurity.org/files/view/38041/wordpressSQL.txt