Oracle Linux: CVE-2021-21350: ELSA-2021-1354: xstream security update (IMPORTANT)

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to execute arbitrary code 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.
A flaw was found in xstream. A remote attacker may be able to execute arbitrary code only by manipulating the processed input stream. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.