MailEnable before 8.60 allows XXE via an XML document in the request.aspx Options parameter.
https://www.nccgroup.trust/uk/our-research/multiple-vulnerabilities-in-mailenable/
https://web.archive.org/web/20150329173628/http://www.mailenable.com/Standard-ReleaseNotes.txt
Source: Mitre, NVD
Published: 2019-01-16
Updated: 2019-10-03
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
Severity: Medium
Base Score: 10
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Severity: Critical
EPSS: 0.00261