The security of JeepKJ.com has not changed or become compromised. Of course, I don't have access to their server, but as a webmaster and owner or manager of other forums running this software and this type of server, I can say this is an issue with Google and the various browsers that are being swayed by their "warnings."
What Google wants is for all websites to start using more secure server technologies. Browsers like Chrome and Firefox show those warnings when they detect a domain that is using the http protocol, not the https and has any kind of log in script running on the page.
In my opinion, forums like this don't really need to be on https, unless they are collecting sensitive information like credit card transactions. That's not to say your email address and passwords aren't sensitive. And sooner or later, all websites should convert to more secure technology. Google has warned us that our http domains may lose some of our page rank in favor of our competitors who use https. That alone has caused me to make plans to convert my own websites to https very soon.
To be safe, you should use a unique password on every website you log into. Don't use the same password anywhere else. That may seem difficult to some, but there are services, like
LastPass Password Manager that take the headache away from remembering passwords. I've been using it for free for several years now and like it a lot.
But don't fear that there is a problem with JeepKJ.com that keeps you away from the forum and your fellow KJ peeps. I will continue to use this forum every day, but I do encourage the owners to pony up and get that SSL certificate and convert our beloved site to https. Done right, with htaccess redirects and a little work manually editing any hard links in the system from http to https and using the Replacement Variable Manager in the vBulletin ACP to convert any of the internal links posted by members to the https versions, the transition will be smooth. Then all you have to do is alert everyone to edit their Favorites/Bookmarks (the htaccess redirects will always get them to the right version, but the correct links are better).
As usual, this is just my opinion. I'm not a staffer here and don't know the inner workings of this website. But I do feel I have some insight and experience over the last 20+ years of managing forums.
Jim