CMS Made Simple 2.1.6 Code Execution / Cross Site Scripting

CMS Made Simple version 2.1.6 suffers from code execution and cross site scripting vulnerabilities.

MD5 | fe8ae1a4ea67237579bd325e4d507415

# Title:             CMSMS 2.1.6 Multiple Vulnerabilities
# Date: 10-05-2017
# Tested on: Windows 8 64-bit
# Exploit Author: Osanda Malith Jayathissa (@OsandaMalith)
# Original write-up:
# CVE: CVE-2017-8912

Remote Code Execution

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


Stored XSS

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


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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