Provide references for CVE-2021-4449.
Where can I find more information about CVE-2021-4449?
References are available at: https://www.wordfence.com/threat-intel/vulnerabilities/id/262e3bb3-bc83-4d0b-8056-9f94ec141b8f?source=cve, https://ithemes.com/blog/wordpress-vulnerability-report-june-2021-part-5/#ib-toc-anchor-2, https://wpscan.com/vulnerability/07259a61-8ba9-4dd0-8d52-cc1df389c0ad, https://sploitus.com/exploit?id=WPEX-ID:07259A61-8BA9-4DD0-8D52-CC1DF389C0AD, https://github.com/0xAgun/Arbitrary-File-Upload-ZoomSounds, https://codecanyon.net/item/zoomsounds-wordpress-wave-audio-player-with-playlist/6181433.