Possible solutions of your questions

Hello. the website is checked

validation result

http://diplatte.com/AI-BOLIT-REPORT-__-81813-08-07-2016_15-24.html

this is

criticisms
Vulnerabilities in scripts (2)
/home/diplatte/public_html/libraries/joomla/session/session.php - RCE : https://docs.joomla.org/Security_hotfixes_for_Joomla_EOL_versions
/home/diplatte/public_html/administrator/components/com_rsform/helpers/rsform.php - RCE : RSFORM : rsform.php LINE 1605

to fix an urgent need.

the problem is extremely serious

http://www.securitylab.ru/vulnerability/477642.php

solution description

https://revisium.com/ru/blog/joomla_rce_all_versions_affected.html