Cross Site Scripting (XSS) vulnerability in Booking Core - Ultimate Booking System Booking Core 1.7.0. The “Subscribe” feature of the application is vulnerable to CSV formula injection. The input containing the excel formula is not being sanitized by the application. As a result, when an admin in the backend downloads and opens the CSV, the content of the cells is executed. Vulnerable fields: First name and Last name of the “Subscribe” request.

The “Subscribe” feature in Ultimate Booking System Booking Core 1.7.0 is vulnerable to CSV formula injection. The input containing the excel formula is not being sanitized by the application. As a result when admin in backend download and open the csv, content of the cells are executed.