CVE-2021-21351

MEDIUMMonitor

Published:Mar 23, 2021(5 years ago)

Modified:May 23, 2025

Remote ExploitScope Changes

Vulnerability 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 may allow a remote attacker to load and execute arbitrary code from a remote 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.

Attack Characteristics

Network AccessHigh ComplexityHigh PrivilegesUser Interaction Required

🤖

AI analysis not yet available

Plain-English explanation, risk summary, and remediation steps will appear here once AI analysis is complete.

No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
netapp	oncommand_insight	-	-
apache	activemq	5.15.14	-
apache	activemq	-

Timeline

Published
CVE disclosed publicly
Mar 23, 20215 years ago
Last Modified
Most recent update
May 23, 202512 months ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20261 month ago

References

http://x-stream.github.io/changes.html#1.4.16Release Notes
https://github.com/x-stream/xstream/security/advisories/GHSA-hrcp-8f3q...Third Party Advisory
https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c7219...Issue Tracking

CVSS Score

v3.1

5.4/ 10.0

MEDIUM

AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:N

At a Glance

Affected Products

References

netapp / oncommand_insight

https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0...Issue Tracking

https://lists.debian.org/debian-lts-announce/2021/04/msg00002.htmlMailing List

https://lists.fedoraproject.org/archives/list/package-announce%40lists...Mailing List

https://security.netapp.com/advisory/ntap-20210430-0002/Third Party Advisory

https://www.debian.org/security/2021/dsa-5004Mailing List

https://www.oracle.com//security-alerts/cpujul2021.htmlThird Party Advisory

https://www.oracle.com/security-alerts/cpujan2022.htmlPatch

https://www.oracle.com/security-alerts/cpuoct2021.htmlThird Party Advisory

https://x-stream.github.io/CVE-2021-21351.htmlExploit

https://x-stream.github.io/security.html#workaroundMitigation

http://x-stream.github.io/changes.html#1.4.16Release Notes

https://github.com/x-stream/xstream/security/advisories/GHSA-hrcp-8f3q...Third Party Advisory

https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c7219...Issue Tracking

https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0...Issue Tracking

https://lists.debian.org/debian-lts-announce/2021/04/msg00002.htmlMailing List

https://lists.fedoraproject.org/archives/list/package-announce%40lists...Mailing List

https://security.netapp.com/advisory/ntap-20210430-0002/Third Party Advisory

https://www.debian.org/security/2021/dsa-5004Mailing List

https://www.oracle.com//security-alerts/cpujul2021.htmlThird Party Advisory

https://www.oracle.com/security-alerts/cpujan2022.htmlPatch

https://www.oracle.com/security-alerts/cpuoct2021.htmlThird Party Advisory

https://x-stream.github.io/CVE-2021-21351.htmlExploit

https://x-stream.github.io/security.html#workaroundMitigation

CVSS v3 Vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:N

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionRequired

Impact

ScopeChanged

ConfidentialityNone

IntegrityHigh

AvailabilityNone

Impact Analysis

ConfidentialityNone

NoneLowHigh

IntegrityHigh

NoneLowHigh

AvailabilityNone

NoneLowHigh

CVE-2021-21351

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description