Provide references for CVE-2019-5973.
Where can I find more information about CVE-2019-5973?
References are available at: https://olbsys.com/fixed-vulnerability-issue/, https://wordpress.org/plugins/online-lesson-booking-system/#developers, https://jvn.jp/en/jp/JVN96988995/index.html, https://wpvulndb.com/vulnerabilities/9435.