Security wordpress 4.2.1 cross-site scripting

New Wordpress security flaw

Yesterday a type cross-site scripting vulnerability Wordpress security flaw has been discovered, it is strongly recommended to update Wordpress to the most quickly.

That allows?

Well exploited the latter would allow an attacker to compromise a site using Guest reviews.

How to check if I am impacted?

All web sites that use a version lower than Wordpress 4.2.1 are concerned.

How to fix the?