xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context.
1.16.33-3.2ubuntu31.33.06-0ubuntu10.6.3-3build10.1.0+git20150808-10.1.0+git20150808-24.8.1-1ubuntu34.8.1-1ubuntu44.8.2-3.1ubuntu14.9.0-3ubuntu24.9.0-4ubuntu14.9.0-4ubuntu1.10.13+ds1-51.33.14-0.2ubuntu31.33.14-1ubuntu12.2.5-3ubuntu0.40.13+ds1-5build10.13+ds1-64.1.1+xorg4.3.0-37.3ubuntu21.33.14-71.33.14-81.33.14-8build1Exploitability
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