Keeping your Wordpress up to date is a good practice as it allows you to promptly fix any vulnerabilities and prevent malicious attacks. Upgrading Wordpress is not a complicated process either; a single script can take care of it.
Exploit-db contains information on various WordPress vulnerabilities, so staying up-to-date with the latest version is a good habit.
Upgrading WordPress is not so difficult, it can be done with just one script.
wget -c https://wordpress.org/latest.tar.gz echo "Unzip the file" gunzip latest.tar.gz tar xvf latest.tar echo "Remove latest.tar" rm latest.tar echo "Remove wordpress/wp-content/" rm -rf wordpress/wp-content/ echo "Remove /app1/wp-includes/" rm -rf /app1/wp-includes/ echo "Remove /app1/wp-admin/" rm -rf /app1/wp-admin/ echo "Remove /app2/wp-includes/" rm -rf /app2/wp-includes/ echo "Remove /app2/wp-admin/" rm -rf /app2/wp-admin/ echo "cp -rf wordpress/* /app1/" cp -rf wordpress/* /app1/ echo "cp -rf wordpress/* /app2/" cp -rf wordpress/* /app2/ echo "Remove wordpress/" rm -rf wordpress/ echo "Visit http://app1.com/wp-admin/upgrade.php" curl --silent http://app1.com/wp-admin/upgrade.php -o /dev/null echo "Visit http://app2.com/wp-admin/upgrade.php" curl --silent http://app2.com/wp-admin/upgrade.php -o /dev/null