Provide references for CVE-2021-4164.
Where can I find more information about CVE-2021-4164?
References are available at: https://huntr.dev/bounties/2debace1-a0f3-45c1-95fa-9d0512680758, https://github.com/janeczku/calibre-web/commit/785726deee13b4d56f6c3503dd57c1e3eb7d6f30.