In addition to 7 vulnerabilities discovered by the security development team there are also other improvements that will shield your WordPress , you are:
You see, they are not light errors but really serious so do not even think about it, update now! .
Note: not yet available update in Spanish (it is taking a while to be issued so you can release it) but you can update to the English version without problems because there are no translation changes. The only downside is that tomorrow you will see again the notice to update to the Spanish version.
Now available in Spanish.