CVE-2021-21346
CVSS v3
9.8
CRITICAL
EPSS Score
4.0 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2021-03-23
Frequently asked questions
What is CVE-2021-21346?
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.
Is CVE-2021-21346 actively exploited?
Active exploitation of CVE-2021-21346 has not been confirmed. The EPSS score is 4.0%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-21346?
CVE-2021-21346 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-21346 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
No credit card required · 500 free checks/month · Free API key
Other 2021 vulnerabilities worth triaging
Ranked by exploit probability (EPSS).