CVE Catalog

CVE-2021-21341

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Very high risk
77.80%

100th percentile - higher than 100% of all known CVEs

Summary

Vulnerability in XStream before version 1.4.16 allows an attacker to allocate 100% CPU time on the target system, leading to denial of service. Users relying on the default blacklist of the Security Framework are affected.

Risk Assessment

The attack can cause system overload and service unavailability, potentially disrupting application operations and impacting business continuity.

Recommendation

Upgrade XStream to version 1.4.16 or later. It is recommended to configure the security framework with a whitelist limited to minimal required types.

Other vulnerabilities in XStream

See all
Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS