The WordPress is free and open source software for creating websites, blogs or applications. It is written in PHP and MySQL. It is used as a Content Management System (CMS) and has a lot of features, including an architecture for plugins functions, and a system of standards.
It was first released on May 27, 2003, by Matt Mullenweg as a variation b2 / cafelog. As of August 2020, the version 5.5 has been downloaded more than 21,2 million times.
The developers of the web application released WordPress 5.5.2 as a security and maintenance update on October 29, 2020.
14 were fixed in this version errors, which are described in release notes. This particular update fixes a critical vulnerability that allows a remote attacker to take control of a page through a denial of service attack attack).
Therefore, you should update as soon as possible if your web application has not already been updated automatically.
On October 30, 2020, WordPress 5.5.3 was released as an update to bug fix.