Deserialization in Apache Activemq

CVE-2021-21348

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 occupy a thread that consumes maximum CPU time and will never return. No…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.138 (96.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-21348?
CVE-2021-21348 is a medium-severity vulnerability in Apache Activemq, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2021-03-23.
How severe is CVE-2021-21348?
Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2021-21348 known to be exploited?
3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.