Provide references for CVE-2021-3768.
Where can I find more information about CVE-2021-3768?
References are available at: https://huntr.dev/bounties/64a0229f-ff5e-4c64-b83e-9bfc0698a78e, https://github.com/bookstackapp/bookstack/commit/5e6092aaf8fd420202016038286554860bf8ea64.