CVE-2021-39144

8.5 HIGH CISA KEV - Actively Exploited
Published: August 23, 2021 Modified: October 24, 2025
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://packetstormsecurity.com/files/169859/VMware-NSX-Manager-XStream-Unauthenticated-Remote-Code-Execution.html
Source: security-advisories@github.com
Exploit Third Party Advisory VDB Entry
https://github.com/x-stream/xstream/security/advisories/GHSA-j9h8-phrw-h4fh
Source: security-advisories@github.com
Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00017.html
Source: security-advisories@github.com
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/
Source: security-advisories@github.com
Broken Link Mailing List Release Notes
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/
Source: security-advisories@github.com
Broken Link Mailing List Release Notes
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/
Source: security-advisories@github.com
Broken Link Mailing List Release Notes
https://security.netapp.com/advisory/ntap-20210923-0003/
Source: security-advisories@github.com
Third Party Advisory
https://www.debian.org/security/2021/dsa-5004
Source: security-advisories@github.com
Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html
Source: security-advisories@github.com
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html
Source: security-advisories@github.com
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html
Source: security-advisories@github.com
Patch Third Party Advisory
https://x-stream.github.io/CVE-2021-39144.html
Source: security-advisories@github.com
Exploit Vendor Advisory
http://packetstormsecurity.com/files/169859/VMware-NSX-Manager-XStream-Unauthenticated-Remote-Code-Execution.html
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Third Party Advisory VDB Entry
https://github.com/x-stream/xstream/security/advisories/GHSA-j9h8-phrw-h4fh
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00017.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Mailing List Release Notes
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Mailing List Release Notes
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Mailing List Release Notes
https://security.netapp.com/advisory/ntap-20210923-0003/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.debian.org/security/2021/dsa-5004
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://x-stream.github.io/CVE-2021-39144.html
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39144
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

25 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.5 / 10.0
EPSS (Exploit Probability)
94.4%
100th percentile
Exploitation Status
Actively Exploited
Remediation due: 2023-03-31

Weaknesses (CWE)

CWE-94 CWE-502 CWE-306 CWE-502

Affected Vendors

debian xstream fedoraproject oracle netapp

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