CVE-2021-21349
A Server-Side Forgery Request can be activated unmarshalling with XStream to access data streams from an arbitrary URL referencing a resource in an intranet or the local host
Description
XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to request data from internal resources that are not publicly available 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. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.
How to fix CVE-2021-21349
To remediate CVE-2021-21349, upgrade the affected package to a fixed version below.
- —upgrade to 5.15.14 or later
- —upgrade to 1.4.15-2 or later
- —upgrade to 1.4.16 or later
Is CVE-2021-21349 being exploited?
Moderate — EPSS is 6.7%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (3)
- from 0, < 5.15.14 | >= 5.16.0, <= 5.16.0, >= 5.16.1, <= 5.16.1
- from 0, < 1.4.15-2
- from 0, < 1.4.16
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N |