Provide references for CVE-2020-22783.
Where can I find more information about CVE-2020-22783?
References are available at: https://github.com/ether/etherpad-lite/commit/53f126082a8b3d094e48b159f0f0bc8a5db4b2f4, https://github.com/ether/etherpad-lite/issues/3421.