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CVE-2021-39146

8.5
HIGHCVSS v3.1 Base Score
50.44%
MEDIUM RiskEPSS (98th percentile)

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

Published: 8/23/2021
Modified: 5/23/2025
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Vulnerability Summary

CVSS v3 Score

8.5HIGH

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

EPSS Score (Exploitation Probability)

50.44%MEDIUM Exploitation Risk
98th percentile

This vulnerability has a 50.44% probability of being exploited in the next 30 days, ranking higher than 98% of all scored CVEs.

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