The WebWork 1 web application framework in Atlassian JIRA before 3.13.2 allows remote attackers to invoke exposed public JIRA methods via a crafted URL that is dynamically transformed into method calls, aka "WebWork 1 Parameter Injection Hole."
https://exchange.xforce.ibmcloud.com/vulnerabilities/47211
http://www.securityfocus.com/bid/32746
http://secunia.com/advisories/33084
http://confluence.atlassian.com/display/JIRA/JIRA+Security+Advisory+2008-12-09