cve/2021/CVE-2021-39151.md

### [CVE-2021-39151](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39151)
![](https://img.shields.io/static/v1?label=Product&message=xstream&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%201.4.18%20%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-434%3A%20Unrestricted%20Upload%20of%20File%20with%20Dangerous%20Type&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-502%3A%20Deserialization%20of%20Untrusted%20Data&color=brightgreen)

### Description

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.

### POC

#### Reference
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html

#### Github
No PoCs found on GitHub currently.