CVE-2021-39139highCWE-434CWE-502

CVE-2021-39139: high-severity vulnerability in x-stream xstream

XStream is vulnerable to an Arbitrary Code Execution attack

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.5epss 4.5%
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. A user is only affected if using the version out of the box with JDK 1.7u21 or below. However, this scenario can be adjusted easily to an external Xalan that works regardless of the version of the Java runtime. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
x-stream · xstream
Related CVEs — x-stream xstream

In the same product, most dangerous first.

CVE-2021-39144HIGHXStream is vulnerable to a Remote Command Execution attackEPSS 98.1%KEVCVE-2020-26217HIGHRemote Code Execution in XStreamEPSS 85.0%CVE-2020-26259MEDIUMXStream is vulnerable to an Arbitrary File Deletion on the local host when unmarshallingEPSS 82.4%CVE-2021-21351MEDIUMXStream is vulnerable to an Arbitrary Code Execution attackEPSS 82.1%CVE-2020-26258MEDIUMServer-Side Forgery Request can be activated unmarshalling with XStreamEPSS 81.8%CVE-2021-21341HIGHXStream can cause a Denial of ServiceEPSS 77.8%