### [CVE-2021-39152](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39152)
![](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&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-502%3A%20Deserialization%20of%20Untrusted%20Data&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-918%3A%20Server-Side%20Request%20Forgery%20(SSRF)&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 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.

### 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
- https://github.com/ARPSyndicate/cve-scores
- https://github.com/ARPSyndicate/cvemon
- https://github.com/tabby-sec/tabby
- https://github.com/wh1t3p1g/tabby
- https://github.com/zwjjustdoit/Xstream-1.4.17