If your site is allowed to be IFRAMEd by another site and thus would be susceptible to click-jacking. This can be prevented by setting X-Frame-Options header or CSP. Setting X-Frame-Options explained in this article.
3 posts tagged with “Umbraco”
Best Umbraco PackagesAugust 24, 2017 · 4 min read
My personal favorite list of packages I use when I build a Umbraco website.