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Vulnerability · Published Mar 22, 2021 · Assigned by GitHub_M

CVE-2021-21345XStream is vulnerable to a Remote Command Execution attack

Medium 5.8

In plain English

A medium-severity code injection in xstream from x-stream. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 72.3% (higher than 99.4% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.8Medium
Exploit odds (30 days)72.3%top 0.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling2Nuclei, Public PoC

Official 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 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libxstream-java1.4.15-2DEBIAN-CVE-2021-21345
Debian:13libxstream-java1.4.15-2DEBIAN-CVE-2021-21345
Debian:14libxstream-java1.4.15-2DEBIAN-CVE-2021-21345
Mavencom.thoughtworks.xstream:xstream1.4.16GHSA-hwpc-8xqv-jvj4

Affected products (as reported)

VendorProductVersions
x-stream xstream < 1.4.16

Weakness: CWE-94, CWE-502 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N

References