CVE-2021-39152highobserved exploitationCWE-502CWE-918

CVE-2021-39152: high-severity vulnerability in x-stream xstream

A Server-Side Forgery Request vulnerability in XStream via HashMap unmarshaling

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63Vexday Risk Score

Patch now. It exploitation observed by VulnCheck and has a working public exploit.

ssvc Actcvss 8.5epss 11%
from disclosure to weapon
Published on NVDAug 23
VulnCheck+1636d
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.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
x-stream · xstream
Related CVEs — x-stream xstream

In the same product, most dangerous first.

CVE-2021-39144HIGHXStream is vulnerable to a Remote Command Execution attackEPSS 98.1%KEVCVE-2020-26217HIGHRemote Code Execution in XStreamEPSS 85.0%CVE-2020-26259MEDIUMXStream is vulnerable to an Arbitrary File Deletion on the local host when unmarshallingEPSS 82.4%CVE-2021-21351MEDIUMXStream is vulnerable to an Arbitrary Code Execution attackEPSS 82.1%CVE-2020-26258MEDIUMServer-Side Forgery Request can be activated unmarshalling with XStreamEPSS 81.8%CVE-2021-21341HIGHXStream can cause a Denial of ServiceEPSS 77.8%