libxstream-java: XStream is a Java library to serialize objects to XML and back again
CVE-2021-21351 is fixed in libxstream-java on 1 platform, first by libxstream-java 1.4.11.1-1~18.04.2, released March 22, 2021. It is not reported as exploited. Patch Radar priority: Routine.
XStream is a Java library to serialize objects to XML and back again. InXStream before version 1.4.16, there is a vulnerability may allow a remoteattacker to load and execute arbitrary code from a remote host only bymanipulating the processed input stream. No user is affected, who followedthe recommendation to setup XStream's security framework with a whitelistlimited to the minimal required types. If you rely on XStream's defaultblacklist of the Security Framework, you will have to use at least version1.4.16.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libxstream-java · Ubuntu 18.04.6 LTS (bionic) | 1.4.11.1-1~18.04.2 | libxstream-java 1.4.11.1-1~18.04.2 | Mar 22, 2021 |
| libxstream-java · Ubuntu 20.04 LTS (focal) | 1.4.11.1-1ubuntu0.2 | libxstream-java 1.4.11.1-1ubuntu0.2 | Mar 22, 2021 |
| libxstream-java · Ubuntu 24.10 (oracular) | 1.4.15-2 | libxstream-java 1.4.15-2 | Jan 16, 2026 |
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