CVE-2021-21347

XStream is a Java library to serialize objects to XML and back again. In
XStream before version 1.4.16, there is a vulnerability which may allow a
remote attacker to load and execute arbitrary code from a remote host only
by manipulating the processed input stream. No user is affected, who
followed the recommendation to setup XStream’s security framework with a
whitelist limited to the minimal required types. If you rely on XStream’s
default blacklist of the Security Framework, you will have to use at least
version 1.4.16.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=985843&gt;