Joomla! Core is prone to an unspecified vulnerability. No available information exists regarding this issue and it's impact on a vulnerable website. Joomla! Core versions 1.0.x ranging from 1.0.0 and up to and including 1.0.3 are vulnerable.

Update to Joomla! Core version 1.0.4 or latest

• https://www.joomla.org/announcements/release-news/498-upgrade-to-joomla-104-security-release-now.html