Wordpress Plugin Hacking my HTTACCESS Files


New member
i am using wordpress themes and plugin on couple of websites and all that website are hosted on shared server (Linux) with single hosting.

From couple of days i am finding issue that my all sites hosted on that servers - httaccess files are changing, and some open website on mobile that redirecting to porn website.

My hosting company seen the issue and told me that in wordpress if you installing any unsecured plugin which may lead to this and all the ftp details of your account is now accessing by hackers.

i have installed couple of plugins and not knowing which are secure and unsecured

Could some one help me how to protect httaccess file