WordPress Concours 1.1 Cross Site Scripting

2017-12-20T00:00:00
ID PACKETSTORM:145504
Type packetstorm
Reporter Nicolas Buzy-Debat
Modified 2017-12-20T00:00:00

Description

                                        
                                            `Product: WordPress Concours Plugin - https://wordpress.org/plugins/wp-concours/  
Vendor: Olyos  
Tested version: 1.1  
CVE ID: CVE-2017-17719  
  
** CVE description **  
A cross-site scripting (XSS) vulnerability in the wp-concours plugin through 1.1 for WordPress allows remote attackers to inject arbitrary web script or HTML via the result_message parameter to includes/concours_page.php.  
  
** Technical details **  
In wp-concours/includes/concours_page.php:18, $_REQUEST['result_message'] is stored in the $message_str variable without proper sanitization. This variable is then echoed back to user on line 28.  
  
Vulnerable code:  
https://plugins.trac.wordpress.org/browser/wp-concours/trunk/includes/concours_page.php#L18  
  
** Proof of Concept **  
http://<host>/wordpress/wp-admin/admin.php?page=concours&result_message=<script>alert(document.cookie);</script>  
  
** Solution **  
No fix available yet.  
  
** Timeline **  
28/09/2017: vendor contacted; vendor asks for technical report  
06/10/2017: requested an update regarding the fix; vendor says in November  
05/12/2017: sent an e-mail to warn about the release of that advisory; no reply  
19/12/2017: report published  
  
** Credits **  
Vulnerability discovered by Nicolas Buzy-Debat working at Orange Cyberdefense Singapore (CERT-LEXSI).  
  
--  
Best Regards,  
  
Nicolas Buzy-Debat  
Orange Cyberdefense Singapore (CERT-LEXSI)  
_________________________________________________________________________________________________________________________  
  
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