Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input document, which triggers a buffer overflow.
2.1.0-4ubuntu1.248.0+build2-0ubuntu0.14.04.11.16.33-3.2ubuntu31.33.06-0ubuntu10.6.3-3build10.1.0+git20150808-10.1.0+git20150808-20.23.3-2ubuntu22.1.0-7ubuntu0.16.04.148.0+build2-0ubuntu0.16.04.13.20.1+git20120521-63.20.1+git20120521-6build10.13+ds1-5Exploitability
AV:NAC:LPR:NUI:NScope
S:UImpact
C:HI:HA:HCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H