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OpenAdvisories
Medium · 5.3 CVE-2021-21342 BIT-activemq-2021-21342EUVD-2021-0673GHSA-hvv8-336g-rx3m

A Server-Side Forgery Request can be activated unmarshalling with XStream to access data streams from an arbitrary URL referencing a resource in an intranet or the local host

Published Mar 22, 2021 · Updated Oct 7, 2026 · Assigned by GitHub_M

Vendor: x-stream Product: xstream Package: com.thoughtworks.xstream:xstream Package: libxstream-java Package: libxstream-java Ecosystem: Debian Ecosystem: Maven Ecosystem: Ubuntu

Description

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability where the processed stream at unmarshalling time contains type information to recreate the formerly written objects. XStream creates therefore new instances based on these type information. An attacker can manipulate the processed input stream and replace or inject objects, that result in a server-side forgery request. 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.

Affected products

VendorProductAffectedFixed
x-stream xstream < 1.4.16 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 14 libxstream-java 1.4.15-2 —
Debian 13 libxstream-java 1.4.15-2 —
Debian 12 libxstream-java 1.4.15-2 —
Debian 9 libxstream-java 1.4.11.1-1+deb9u2 DLA-2616-1

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 20.04 LTS libxstream-java 1.4.11.1-1ubuntu0.2 USN-4943-1
Ubuntu 18.04 LTS libxstream-java 1.4.11.1-1~18.04.2 USN-4943-1
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 16.04 LTS libxstream-java 1.4.8-1ubuntu0.1+esm3 USN-6978-1
Ubuntu Pro 14.04 LTS libxstream-java 1.4.7-1ubuntu0.1+esm2 USN-6978-1

SUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
SLES 15 SP3 xstream 1.4.16-3.8.1 SUSE-SU-2021:1840-1
SLES 15 SP2 xstream 1.4.16-3.8.1 SUSE-SU-2021:1840-1
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SUSE Manager Server Module 4.2 xstream 1.4.16-3.8.1 SUSE-SU-2021:1840-2
SUSE Manager Server Module 4.1 xstream 1.4.16-3.8.1 SUSE-SU-2021:1840-1

openSUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed xstream 1.4.18-1.1 openSUSE-SU-2024:10592-1
openSUSE Leap 15.3 xstream 1.4.16-3.8.1 openSUSE-SU-2021:1840-1
openSUSE Leap 15.2 xstream 1.4.16-lp152.2.6.1 openSUSE-SU-2021:0832-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2 xstream +1 1.3.1-16.amzn2.0.2 ALAS2-2023-2030

Affected packages

EcosystemPackageAffectedFixedRecord
Maven com.thoughtworks.xstream:xstream < 1.4.16 1.4.16 GHSA-hvv8-336g-rx3m

Advisories 11

References