Joomla Acymailing Starter 5.9.5 CSV Macro Injection

`# Exploit Title: Joomla! Component Acymailing Starter 5.9.5 CSV Macro  
Injection  
# Google Dork: N/A  
# Date: 22-03-2018  
################################  
# Exploit Author: Sureshbabu Narvaneni  
################################  
# Vendor Homepage: https://www.acyba.com  
# Software Link: https://extensions.joomla.org/extension/acymailing-starter/  
# Affected Version: 5.9.5  
#Category: WebApps  
# Tested on: Ubuntu 14.04 x86_64/Kali Linux 4.12 i686  
# CVE : CVE-2018-9107  
  
1. Vendor Description:  
  
AcyMailing is a reliable Newsletter and email marketing extension for  
Joomla.  
It enables you to efficiently manage an unlimited number of subscribers,  
organize them into mailing lists, send personalized newsletters (Hi  
{name}...)  
  
2. Technical Description:  
  
CSV Injection (aka Excel Macro Injection or Formula Injection) exists in  
the export feature in the Acyba AcyMailing extension before 5.9.6 for  
Joomla! via a value that is mishandled in a CSV export.  
  
3. Proof Of Concept:  
  
Login as low privileged user who is having access to Acymailing Component.  
Rename user name as @SUM(1+1)*cmd|' /C calc'!A0.  
  
When high privileged user logged in and exported user data then the CSV  
Formula gets executed and calculator will get popped in his machine.  
  
4. Solution:  
  
Upgrade to version 5.9.6  
https://extensions.joomla.org/extension/acymailing-starter/  
  
5. Reference:  
https://github.com/MrR3boot/CVE-Hunting/blob/master/AcyStarter-CSV.mp4  
https://vel.joomla.org/articles/2140-introducing-csv-injection  
  
Sureshbabu Narvaneni,  
Security Analyst | Bug Hunter,  
HackerOne (mrreboot/mrr3boot) | BugCrowd (Mr_R3boot)  
  
  
  
  
`