wordpress is vulnerable to cross-site scripting (XSS). The vulnerability exists because the attacker is able to inject malicious script via post slugs and get it executed when a user visits the page.
blog.ripstech.com
lists.debian.org/debian-lts-announce/2020/11/msg00004.html
lists.fedoraproject.org/archives/list/[email protected]/message/CHHVNK2WYAM3ZTCXTFSEIT56IKLVJHU3/
lists.fedoraproject.org/archives/list/[email protected]/message/VAVVYJKA2I6CRQUINECDPBGWMQDEG244/
lists.fedoraproject.org/archives/list/[email protected]/message/VUXVUAKL2HL4QYJEPHBNVQQWRMFMII2Y/
wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/
www.debian.org/security/2020/dsa-4784