source: https://www.securityfocus.com/bid/17193/info
  
1WebCalendar is prone to multiple SQL-injection vulnerabilities. These issues are due to a failure in the application to properly sanitize user-supplied input before using it in SQL queries. 
  
A successful exploit could allow an attacker to compromise the application, access or modify data, or exploit vulnerabilities in the underlying database implementation.

http://www.exampe.com/mainCal.cfm?=[code]