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.
2021-08-23T19:15:13.247
2025-05-23T16:47:47.407
Analyzed
CVSSv3.1: 8.5 (HIGH)
AV:N/AC:M/Au:S/C:P/I:P/A:P
6.8
6.4