|Title: Reflected XSS in wordpress plugin tidio-form v1.0|
|Author: Larry W. Cashdollar, @_larry0|
|Download Site: https://wordpress.org/plugins/tidio-form|
|Vendor Notified: 2016-02-09|
|Vendor Contact: email@example.com|
|Plugin Name: tidio-form|
There is a reflected XSS vulnerability in the following php code ./tidio-form/popup-insert-help.php: 36:<p>If you want to add the form in different place than subpage/post you need to paste the following shortcode into your subpage <pre><?php echo do_shortcode('[tidio-form id="<?php echo $_GET['formId'] ?>" /]'); ?></pre>.</p> The variable formId appears to send unsanitized data back to the users browser.
Exploit was derived from appearance of first vulnerable parameter in code, there could be more shown above.