Multiple SQL injection vulnerabilities in main.php in the WassUp plugin 1.4 through 1.4.3 for WordPress allow remote attackers to execute arbitrary SQL commands via the (1) from_date or (2) to_date parameter to spy.php.
https://www.exploit-db.com/exploits/5017
http://www.wpwp.org/archives/warning-security-bug-in-version/
http://www.vupen.com/english/advisories/2008/0365