Cross Site Scripting (XSS) vulnerability in craigrodway classroombookings 2.6.4 allows attackers to execute arbitrary code or other unspecified impacts via the input bgcol in file Weeks.php.
https://github.com/craigrodway/classroombookings/issues/52
https://gist.github.com/enferas/bd8ec37999c216eceabd6b80d5a95f94