Provide references for CVE-2021-29447.
Where can I find more information about CVE-2021-29447?
References are available at: https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh, https://wordpress.org/news/category/security/, https://lists.debian.org/debian-lts-announce/2021/04/msg00017.html, https://www.debian.org/security/2021/dsa-4896, http://packetstormsecurity.com/files/163148/XML-External-Entity-Via-MP3-File-Upload-On-WordPress.html, http://packetstormsecurity.com/files/164198/WordPress-5.7-Media-Library-XML-Injection.html, https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/.