In phpMyAdmin 4 before 4.9.4 and 5 before 5.0.1, SQL injection exists in the user accounts page. A malicious user could inject custom SQL in place of their own username when creating queries to this page. An attacker must have a valid MySQL account to access the server.
https://www.phpmyadmin.net/security/PMASA-2020-1/
https://lists.debian.org/debian-lts-announce/2020/01/msg00011.html
https://cybersecurityworks.com/zerodays/cve-2020-5504-phpmyadmin.html
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00024.html