XStream is vulnerable to a Remote Command Execution attack (x-stream xstream)

CVE-2021-21345

MEDIUM 5.8

At a glance

Source: NVD
EPSS: EPSS 72.32 % · percentile 99 (2026-10-29)
State: PUBLISHED
Published: 2021-03-22 23:40 UTC
Updated: 2026-10-07 18:46 UTC
Assigner: GitHub_M
NVD status: Analyzed

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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.

Weaknesses (CWE)

CWE-94 — Improper Control of Generation of Code
CWE-502 — Deserialization of Untrusted Data
CWE-78 — Improper Neutralization of Special Elements used in an OS Command

References

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 5.8	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N	GitHub_M
CVSS 3.1	MEDIUM 5.8	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N	NVD · security-advisories@github.com (Secondary)
CVSS 3.1	CRITICAL 9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)
CVSS 2.0	MEDIUM 6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P	NVD · nvd@nist.gov (Primary)

Advisories

GHSA-hwpc-8xqv-jvj4 — XStream is vulnerable to a Remote Command Execution attack

European references

ENISA EUVD · EUVD-2021-0674
GCVE · GCVE-0-2021-21345

CERT-FR advisories

CERTFR-2021-AVI-951 — Multiples vulnérabilités dans le noyau Linux de RedHat · cert.ssi.gouv.fr
CERTFR-2021-AVI-948 — Multiples vulnérabilités dans les produits SAP · cert.ssi.gouv.fr
CERTFR-2021-AVI-943 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2021-AVI-490 — Multiples vulnérabilités dans IBM Spectrum Protect · cert.ssi.gouv.fr
CERTFR-2021-AVI-407 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
CERTFR-2021-AVI-395 — Multiples vulnérabilités dans IBM Spectrum Control · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:* < 5.15.14
cpe:2.3:a:apache:activemq:5.16.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:activemq:5.16.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:jmeter:*:*:*:*:*:*:*:* < 5.5
cpe:2.3:a:xstream:xstream:*:*:*:*:*:*:*:* < 1.4.16
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_enterprise_default_management:2.10.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_enterprise_default_management:2.12.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_platform:2.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_platform:2.7.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_platform:2.9.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_platform:2.12.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_virtual_account_management:14.2.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_virtual_account_management:14.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_virtual_account_management:14.5.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:business_activity_monitoring:11.1.1.9.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:business_activity_monitoring:12.2.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:business_activity_monitoring:12.2.1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_billing_and_revenue_management_elastic_charging_engine:12.0.0.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_policy_management:12.5.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_unified_inventory_management:7.3.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_unified_inventory_management:7.3.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_unified_inventory_management:7.3.5:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_unified_inventory_management:7.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_unified_inventory_management:7.4.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*
cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59:*:*:*:*:*:*:*
cpe:2.3:a:oracle:retail_xstore_point_of_service:16.0.6:*:*:*:*:*:*:*
cpe:2.3:a:oracle:retail_xstore_point_of_service:17.0.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:retail_xstore_point_of_service:18.0.3:*:*:*:*:*:*:*
cpe:2.3:a:oracle:retail_xstore_point_of_service:19.0.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:webcenter_portal:11.1.1.9.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:webcenter_portal:12.2.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:webcenter_portal:12.2.1.4.0:*:*:*:*:*:*:*

Affected products

Product	Versions
x-stream · xstream	affected < 1.4.16

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD

🟡 XStream is vulnerable to a Remote Command Execution attack (x-stream xstream)