The Admin Upload Image functionality in Joomla! before 1.0.11 allows remote authenticated users to upload files outside of the /images/stories/ directory via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/28630
http://www.vupen.com/english/advisories/2006/3408
http://www.joomla.org/content/view/1843/74/