The version of moment.js used in Jira was vulnerable to a regular expression denial of service

The version of moment.js used in in Jira before version 7.12.3, from version 7.13.0 before version 7.13.1 and before version 8.0.0 allows remote attackers to cause a denial of service in user's browsers via a regular expression denial of service. For additional details see https://github.com/moment/moment/issues/2936.