WordPress before 5.2.4 does not properly consider type confusion during validation of the referer in the admin pages, possibly leading to CSRF.
https://www.debian.org/security/2020/dsa-4677
https://www.debian.org/security/2020/dsa-4599
https://wpvulndb.com/vulnerabilities/9913
https://wordpress.org/news/2019/10/wordpress-5-2-4-security-release/
https://seclists.org/bugtraq/2020/Jan/8
https://lists.debian.org/debian-lts-announce/2019/11/msg00000.html
https://github.com/WordPress/WordPress/commit/b183fd1cca0b44a92f0264823dd9f22d2fd8b8d0