Provide references for CVE-2019-19999.
Where can I find more information about CVE-2019-19999?
References are available at: https://github.com/halo-dev/halo/issues/419, https://github.com/halo-dev/halo/issues/440, https://github.com/halo-dev/halo/compare/v1.1.3-beta.2...v1.2.0-beta.1.