Unlimited Pop-Ups WordPress Plugin XSS Vulnerability

## FULL DISCLOSURE

#Product : Unlimited Pop-Ups WordPress Plugin
#Exploit Author : Rahul Pratap Singh
#Version : 1.4.3
#Home page Link :
http://codecanyon.net/item/unlimited-popups-wordpress-plugin/8575498
#Website : 0x62626262.wordpress.com
#Linkedin : https://in.linkedin.com/in/rahulpratapsingh94
#Date : 21/4/2016

XSS Vulnerability:

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Description:
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"callback, shortcode, id, and page"  parameters are not sanitized that
leads to Reflected XSS.

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Vulnerable Code:
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File Name: testfiles/Unlimited Pop-Ups WordPress
Plugin/upload/cj-popups/framework/includes/admin_form.php
Found at line:1319
echo '<form
action="'.admin_url('admin.php?page='.cjpopups_item_info('page_slug').'&callback='.@$_GET['callback'].'').'"
method="post" enctype="multipart/form-data">';

File Name: testfiles/Unlimited Pop-Ups WordPress
Plugin/upload/cj-popups/framework/includes/admin_ajax.php
Found at line:162
echo '<form action="" method="post" id="cj-shortcode-settings-form"
data-shortcode-stype="'.$shortcode_options['stype'].'"
data-shortcode-name="'.$_POST['shortcode'].'">';

File Name: testfiles/Unlimited Pop-Ups WordPress
Plugin/upload/cj-popups/framework/includes/sample-code/dynamic-sidebar-setup/theme_dynamic_sidebars.php
Found at line:139
<td><?php echo $_GET['id']; ?></td>

File Name: testfiles/Unlimited Pop-Ups WordPress
Plugin/upload/cj-popups/framework/includes/options/core_import_export.php
Found at line:94
echo '<form class="margin-30-top"
action="'.admin_url('admin.php?page='.@$_GET['page'].'&callback='.@$_GET['callback'].'').'"
method="post" enctype="multipart/form-data">';
----------------------------------------

Fix:
Update to 1.4.4

Vulnerability Disclosure Timeline:
→ March 12, 2016  – Bug discovered, initial report to Vendor
→ March 14, 2016  – Vendor Acknowledged
→ March 30, 2016  – Vendor Deployed a Patch

Pub Ref:
https://0x62626262.wordpress.com/2016/04/21/unlimited-pop-ups-wordpress-plugin-xss-vulnerability/
http://codecanyon.net/item/unlimited-popups-wordpress-plugin/8575498