Last night, September 8, 2021, WordPress 5.8.1 was released to the public. The update addresses a security issue and fixes 60 issues. For more see note.
According to WordPress:
Dawaffe, a member of the WordPress Security Team, helped fix a security flaw in the REST API.
Securitum's Michał Bentkowski reported an XSS security vulnerability in his block editor.
Lodash library was updated to version 4.17.21 for upstream security fixes.
The WordPress security team would also like to thank the following for their assistance:
Evan Ricafort for reporting an XSS vulnerability to the block editor of version 5.8.
and Steve Henty for reporting a privilege escalation issue again to the block editor.
You can download the update from official site, or upgrade your page from the admin panel Dashboard - Updates