The package whoogle-search before 0.7.2 are vulnerable to Cross-site Scripting (XSS) via the query string parameter q. In the case where it does not contain the http string, it is used to build the errormessage that is then rendered in the error.html template, using the flask.rendertemplate function. However, the error_message is rendered using the | safe filter, meaning the user input is not escaped.