WordPress before 5.2.3 allows XSS in post previews by authenticated users.
https://www.debian.org/security/2020/dsa-4677
https://www.debian.org/security/2020/dsa-4599
https://wpvulndb.com/vulnerabilities/9862
https://wordpress.org/news/2019/09/wordpress-5-2-3-security-and-maintenance-release/
https://seclists.org/bugtraq/2020/Jan/8
https://lists.debian.org/debian-lts-announce/2019/10/msg00023.html
http://packetstormsecurity.com/files/160745/WordPress-Core-5.2.2-Cross-Site-Scripting.html