Hello , i'm an experienced penetration tester and i hold CEH and CHFI certifications and i'm an security instructor , i'll test your site as the following:
1- Server side testing (DDOS attack)
2- Server response time for requests processing
3- CMS testing (Sql injection - header injection - CSRF - XSS - brute force - remote file include Exploits and more!)
4- i'll fix the issues (exploits) on your site .
5- finally , you'll get a detailed report when i finish testing.
Thanks