PoC Index85,079 CVEs with PoCs

CVE-2021-21341

XStream can cause a Denial of Service

HIGH 7.5EPSS 77.8%

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is vulnerability which may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service 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.

Affected
x-stream · xstream
CVSS v3.1 NVD
7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0 NVD
7.1 HIGHAV:N/AC:M/Au:N/C:N/I:N/A:C
EPSS
77.80% chance of exploitation in the next 30 days, 100th percentile
Published
2021-03-22
Updated
2026-10-07

Proof-of-concept exploits (2)

Security advisories

References

Related