We have identified and fixed a vulnerability in JIRA which allowed unauthenticated attackers to commit actions on behalf of any other authorised user. In order to exploit this vulnerability, an attacker requires access to JIRA web interface.
The vulnerability affects all supported versions of JIRA up to and including 6.1.3. It has been fixed in 6.1.4.
For more information, see our security advisory.
Patches are available at
JIRA 4.4.5: http://downloads.atlassian.com/software/jira/downloads/patch/patch-JRA-35797-4.4.5-20140303.zip
JIRA 5.0.7: http://downloads.atlassian.com/software/jira/downloads/patch/patch-JRA-35797-5.0.7-20140303.zip
JIRA 5.1.8: http://downloads.atlassian.com/software/jira/downloads/patch/patch-JRA-35797-5.1.8.zip
JIRA 5.2.11: http://downloads.atlassian.com/software/jira/downloads/patch/patch-JRA-35797-5.2.11-20140303.zip
JIRA 6.0.8: http://downloads.atlassian.com/software/jira/downloads/patch/patch-JRA-35797-6.0.8.zip