WordPress 4.3.1 fixes twenty-six bugs and addresses three issues, including two cross-site scripting vulnerabilities and a potential privilege escalation. See the official WordPress update at https://wordpress.org/news/2015/09/wordpress-4-3-1/ for all the details. Immediate Update Strongly Recommended
Version 4.3 of WordPress, named “Billie” has just been released and we recommend you update now. See the official WordPress update at https://wordpress.org/news/2015/08/billie/ for all the details.