Multiple unspecified vulnerabilities in Joomla! before 1.0.11 allow attackers to bypass user authentication via unknown vectors involving the (1) do_pdf command and the (2) emailform com_content task.
The com_rss option (rss.php) in (1) Mambo and (2) Joomla! allows remote attackers to cause a denial of service (disk consumption and possibly web-server outage) via multiple requests with different values of the feed parameter.
Joomla! 1.03 does not restrict the number of "Search" Mambots, which allows remote attackers to cause a denial of service (resource consumption) via a large number of Search Mambots.