A flaw was found in org.codehaus.jackson:jackson-mapper-asl:1.9.x libraries. XML external entity vulnerabilities similar CVE-2016-3720 also affects codehaus jackson-mapper-asl libraries but in different classes.
https://lists.debian.org/debian-lts-announce/2020/08/msg00039.html
https://lists.debian.org/debian-lts-announce/2020/01/msg00037.html