All versions of GitLab prior to 11.5.1, 11.4.8, and 11.3.11 do not send an email to the old email address when an email address change is made.
{ "binaries": [ { "binary_version": "8.5.8+dfsg-5", "binary_name": "gitlab" } ] }
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-19580.json"