LemonLDAP::NG before 1.9.20 has an XML External Entity (XXE) issue when submitting a notification to the notification server. By default, the notification server is not enabled and has a "deny all" rule.
https://lists.debian.org/debian-lts-announce/2019/07/msg00003.html
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues/1820
https://www.calypt.com/blog/index.php/cve-2019-13031-xxe-on-lemonldapng-2-0-5/
Source: Mitre, NVD
Published: 2019-06-28
Updated: 2019-08-26
Base Score: 6.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 8.1
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: High
EPSS: 0.00323