Unspecified vulnerability in the Front-End Editor in the com_content component in Joomla! before 1.5.15 allows remote authenticated users, with Author privileges, to replace the articles of an arbitrary user via unknown vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/54161
http://secunia.com/advisories/37262
http://developer.joomla.org/security/news/305-20091103-core-front-end-editor-issue-.html