CVSS v3
8.5
HIGH
EPSS Score
67.8%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. 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](https://x-stream.github.io/security.html#framework), you will have to use at least version 1.4.18.
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. 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](https://x-stream.github.io/security.html#framework), you will have to use at least version 1.4.18.
Active exploitation of CVE-2021-39152 has not been confirmed. The EPSS score is 67.8%, indicating the estimated probability of exploitation in the next 30 days.
CVE-2021-39152 has a CVSS v3 base score of 8.5 (HIGH severity).
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Ranked by exploit probability (EPSS).