CVE-2021-39150

Name of the Vulnerable Software and Affected Versions XStream versions prior to 1.4.18

Description XStream is a simple library to serialize objects to XML and back again. In affected versions, this issue 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 8 to 14. 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 1.4.18.

Recommendations To resolve the issue, use at least version 1.4.18 of XStream. As a temporary workaround, consider setting up 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, ensure you are using at least version 1.4.18.