Provide references for CVE-2019-16766.
Where can I find more information about CVE-2019-16766?
References are available at: https://github.com/LabD/wagtail-2fa/security/advisories/GHSA-89px-ww3j-g2mm, https://github.com/labd/wagtail-2fa/commit/a6711b29711729005770ff481b22675b35ff5c81, https://github.com/labd/wagtail-2fa/commit/13b12995d35b566df08a17257a23863ab6efb0ca.