The links you have provided relate to a piece of software called vbseo, this is not something we use.
We are running on the most up-to-date version of vBulletin 3, which is 3.8.9. vBulletin 5 is a different product.
The redirect to filestore only occurs when you access the site via Google. It is caused by an advert; once we are aware of the problem it can be rectified in about 5 seconds and is simply a redirect, it does not pose any security issues
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Is anyone getting random blank tabs opening when browsing the forum?