The Workreap WordPress theme before 2.2.2 AJAX actions workreap_award_temp_file_uploader and workreap_temp_file_uploader did not perform nonce checks, or validate that the request is from a valid user in any other way. The endpoints allowed for uploading arbitrary files to the uploads/workreap-temp directory. Uploaded files were neither sanitized nor validated, allowing an unauthenticated visitor to upload executable code such as php scripts.
https://github.com/jayhutajulu1/CVE-2021-24499
https://github.com/wkdwodud199/P0t4t0_CVE_All_in1
https://github.com/j4k0m/CVE-2021-24499
https://github.com/RyouYoo/CVE-2021-24499
https://wpscan.com/vulnerability/74611d5f-afba-42ae-bc19-777cdf2808cb
https://jetpack.com/2021/07/07/multiple-vulnerabilities-in-workreap-theme/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-11411
http://packetstormsecurity.com/files/172876/WordPress-Workreap-2.2.2-Shell-Upload.html