CVE-2021-39152 HIGH

CVE-2021-39152: A Server-Side Forgery Request vulnerability in XStream via HashMap unmarshaling

Vendor X-Stream
Product xstream
Weakness CWE-502 · Unsafe deserialization
Published August 23, 2021
Last update August 4, 2024

CVSS base score

8.5/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 23, 2021 CVE published
August 4, 2024 Record updated