CVE-2021-21344
XStream is vulnerable to an Arbitrary Code Execution attack
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 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. 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-2021-21344
To remediate CVE-2021-21344, upgrade the affected package to a fixed version below.
- —upgrade to 1.4.16 or later
Is CVE-2021-21344 being exploited?
Likely — EPSS is 76.0%, placing CVE-2021-21344 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (1)
- from 0, < 1.4.16
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |