Provide references for CVE-2021-23421.
Where can I find more information about CVE-2021-23421?
References are available at: https://snyk.io/vuln/SNYK-JS-MERGECHANGE-1310985, https://github.com/VladimirShestakov/merge-change/blob/9901f145e06158f284f52de42e6ba5b0f702fb65/utils.js%23L89-L123.