CVE-2021-29505

XStream is vulnerable to a Remote Command Execution attack

HIGH
8.8
CVSS Score
Published: May 28, 2021 at 09:00 PM UTC
Updated: October 7, 2026 at 09:17 PM UTC
17 products affected across 5 vendorsDebian LinuxFedoraSnapmanager

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Severity
HIGH8.8
Exploit prediction
EPSS 77%
SSVC
No known exploit

Description

XStream is software for serializing Java objects to XML and back again. A vulnerability in XStream versions prior to 1.4.17 may allow a remote attacker has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types is affected. The vulnerability is patched in version 1.4.17.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-94CWE-502

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