https://github.com/beerpwn/ctf/blob/master/CVE/CVE-2019-13571/report.pdf 
https://github.com/beerpwn/ctf/tree/master/CVE/CVE-2019-13571 
https://plugins.trac.wordpress.org/changeset/2123623 
https://wordpress.org/plugins/advanced-cf7-db/#developers 
https://wpvulndb.com/vulnerabilities/9479 
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