DotNetNuke (formerly IBuySpy Workshop) 1.0.6 through 1.0.10d allows remote attackers to obtain sensitive information, including the SQL server username and password, via a GET request for source or configuration files such as Web.config.
The install wizard in DotNetNuke 4.0 through 5.1.4 does not prevent anonymous users from accessing functionality related to determination of the need for an upgrade, which allows remote attackers to access version information and possibly other sensitive information.