learn.co.kr XSS vulnerability

Vulnerable URL: http://learn.co.kr/wwwb/CrazyWWWBoard.cgi?db=grammar%27%22--%21%3E%3Cimg+src%3Dx+onerror%3Dalert%28%22openbugbounty%22%29%3E Details: Description| Value ---|--- Patched:| No Latest check for patch:| 25.10.2017 Vulnerability type:| XSS Vulnerability status:| Publicly disclosed Alex...