XStream Remote Code Execution Vulnerability (CVE-2020-26217) Threat Alert

XStream Remote Code Execution Vulnerability (CVE-2020-26217) Threat Alert

dezembro 9, 2020 | Adeline Zhang


Recently, XStream released a security advisory that fixes a remote code execution vulnerability (CVE-2020-26217). The vulnerability may allow a remote attacker to execute arbitrary code by sending crafted requests to the web application that uses XStream and thereby taking control of the target server. XStream is a commonly used tool for converting between Java objects and XML.

The vulnerability is a variation of CVE-2013-7285. This time, it uses a different set of classes to bypass blacklist restriction in the deserialization process, thus leading to remote code execution.

Reference link:


Affected Versions

  • XStream: XStream versions <= 1.4.13

Unaffected Versions

  • XStream: XStream version 1.4.14


The vendor has released the latest versions to fix this vulnerability. Affected users are advised to upgrade as soon as possible.

The latest versions are available at the following link: https://github.com/x-stream/xstream/releases.


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NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks. The company’s Intelligent Hybrid Security strategy utilizes both cloud and on-premises security platforms, built on a foundation of real-time global threat intelligence, to provide multi-layered, unified and dynamic protection against advanced cyber attacks.

NSFOCUS works with Fortune Global 500 companies, including four of the world’s five largest financial institutions, organizations in insurance, retail, healthcare, critical infrastructure industries as well as government agencies. NSFOCUS has technology and channel partners in more than 60 countries, is a member of both the Microsoft Active Protections Program (MAPP), and the Cloud Security Alliance (CSA). A wholly owned subsidiary of NSFOCUS Technologies Group Co., Ltd., the company has operations in the Americas, Europe, the Middle East and Asia Pacific.