index2.php in Mambo Site Server 3.0.0 through 3.0.5 allows remote attackers to gain Mambo administrator privileges by setting the PHPSESSID parameter and providing the appropriate administrator information in other parameters.
Multiple PHP remote file inclusion vulnerabilities in the SWmenu (com_swmenupro and com_swmenufree) 4.0 component for Mambo and Joomla! allow remote attackers to execute arbitrary PHP code via a URL in the mosConfig_absolute_path parameter to ImageManager/Classes/ImageManager.php under the (1) components/ or (2) administrator/components/ directory trees.
Mambo Site Server 4.0.11 installs with a default username and password of admin, which allows remote attackers to gain privileges.