CVE Catalog

CVE-2021-39150

HighCVSS 8.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

High risk
3.44%

89th percentile - higher than 89% of all known CVEs

Summary

XStream is a library for serializing objects to XML and back. The vulnerability allows a remote attacker to request data from internal resources that are not publicly available by manipulating the processed input stream with a Java runtime version 14 to 8. Users who configured the security framework with a whitelist are not affected. If relying on XStream's default blacklist, you must use at least version 1.4.18.

Risk Assessment

The risk for the organization is unauthorized access to internal resources, which could lead to data leakage or privilege escalation. The attack can be performed remotely without authentication.

Recommendation

It is recommended to upgrade XStream to version 1.4.18 or later and configure the security framework with a whitelist of types. Also, limit processing of untrusted input data.

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 request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. 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](https://x-stream.github.io/security.html#framework), you will have to use at least version 1.4.18.

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