WordPress 5.8.1 was released on September 9 as a security update to fix 3 vulnerabilities (XSS, privilege escalation, data exposure). It is recommended to update as soon as possible to prevent an exploitation.
Not only WordPress 5.8 also all versions above 5.4 got an update to fix the issues.
Besides security fixes, WordPress 5.8.1 also contains 60 bug fixes.
Remember to create a backup before installing updates.
