CVE Catalog

CVE-2021-39154

HighCVSS 8.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Very high risk
4.74%

92th percentile - higher than 92% of all known CVEs

Summary

XStream is a library to serialize objects to XML and back. This vulnerability allows a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream. Users who followed the recommendation to set up XStream's security framework with a whitelist limited to minimal required types are not affected. XStream 1.4.18 no longer uses a blacklist by default, as it cannot be secured for general purpose.

Risk Assessment

Risk of remote code execution on the server, potentially leading to full system compromise and data confidentiality breach.

Recommendation

It is recommended to configure XStream's security framework with a whitelist limited to minimal required types or upgrade to version 1.4.18.

Other vulnerabilities in XStream

See all
Original NVD description (English source)

XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability 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. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

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