Bamboo had a resource that deserialised arbitrary user input without restriction. Attackers can use this vulnerability to execute Java code of their choice on systems that have a vulnerable version of Bamboo. To exploit this issue, attackers need to be able to access the Bamboo JMS port (port 54663 by default).
Affected versions: * All versions of Bamboo from 2.3.1 before 5.9.9 (the fixed version for 5.9.x) are affected by this vulnerability.
\ Fix: * Bamboo 5.10.0 is available for download from https://www.atlassian.com/software/bamboo/download. * Bamboo 5.9.9 is available for download from https://www.atlassian.com/software/bamboo/download-archives.
\ For additional details see the [full advisory|https://confluence.atlassian.com/x/VzlZLw].