CVE-2021-39144

HighCVSS 8.5/10Known exploited (CISA KEV)Last modified Jun 17, 2026

Description

XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker 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. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

Metrics

CVSS 3.1 8.5/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-94CWE-502CWE-306

Affected software

VendorProductVersions
x-streamxstream< 1.4.18

References

Timeline

Published
Aug 23, 2021
Last modified
Jun 17, 2026
Added to CISA KEV
Mar 10, 2023
NVD status
Analyzed

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CVE-2021-39144: High severity, CVSS 8.5 | Vulnix