Kahua before 0.7, when running multiple applications under a single supervisor, grants application access on the basis of username instead of username and database name, which allows remote authenticated users to obtain unauthorized access if different databases assign the same username to different user accounts.
https://exchange.xforce.ibmcloud.com/vulnerabilities/30206
http://www.vupen.com/english/advisories/2006/4486
http://www.timedia.co.jp/news/2467470581
http://www.securityfocus.com/bid/21074
http://www.kahua.org/cgi-bin/kahua.fcgi/kahua-web/show/KSA/KSA2006-001