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Published: 23 March 2021

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 who has sufficient rights to execute commands of the 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.



CVSS 3 base score: 9.9


Package Release Status
Launchpad, Ubuntu, Debian
Released (1.4.16)
Ubuntu 21.10 (Impish Indri)
Released (1.4.15-2)
Ubuntu 21.04 (Hirsute Hippo)
Released (1.4.15-1ubuntu0.1)
Ubuntu 20.04 LTS (Focal Fossa)
Released (
Ubuntu 18.04 LTS (Bionic Beaver)
Released (
Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(end of standard support, was needs-triage)
Ubuntu 14.04 ESM (Trusty Tahr) Needs triage