In Umbraco 7.3.8, there is SQL Injection in the backoffice/PageWApprove/PageWApproveApi/GetInpectSearch method via the nodeName parameter.
https://our.umbraco.com/download/releases/738/
https://gist.github.com/shiham101/d1de44d1dcf2c33d401ef2f8cbb04f9f