A Remote Code Execution vulnerability exists in the gVectors wpDiscuz plugin 7.0 through 7.0.4 for WordPress, which allows unauthenticated users to upload any type of file, including PHP files via the wmuUploadFiles AJAX action.
https://github.com/wvverez/CVE-2020-24186
https://github.com/GazettEl/CVE-2020-24186
https://github.com/Sakura-501/CVE-2020-24186-exploit
https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-16921
http://packetstormsecurity.com/files/163302/WordPress-wpDiscuz-7.0.4-Shell-Upload.html
http://packetstormsecurity.com/files/163012/WordPress-wpDiscuz-7.0.4-Remote-Code-Execution.html
http://packetstormsecurity.com/files/162983/WordPress-wpDiscuz-7.0.4-Shell-Upload.html