The vendor has released fixes to address this issue. Users are advised to download either DotNetNuke 1.0.10e - FULL (for those who are installing DotNetNuke for the first time or are running a version prior to 1.0.10d) or DotNetNuke 1.0.10e - PATCH (or those who are already running DotNetNuke 1.0.10d) from the vendor site.
DotNetNuke contains a flaw that allows a remote cross site scripting attack. This flaw exists because the application does not validate input variables upon submission to the EditModule.aspx script. This could allow a user to create a specially crafted URL that would execute arbitrary code in a user's browser within the trust relationship between the browser and the server, leading to a loss of integrity.
Upgrade to version10.0.10e or higher, as it has been reported to fix this vulnerability. An upgrade is recommended as there are no known workarounds.