WordPress Cookie Law Bar 1.2.1 Cross Site Scripting

WordPress Cookie Law Bar plugin version 1.2.1 suffers from a persistent cross site scripting vulnerability.

MD5 | 77834bde8a48524c03aaf85577842c66

# Exploit Title: WordPress Plugin Cookie Law Bar 1.2.1 - 'clb_bar_msg' Stored Cross-Site Scripting (XSS)
# Date: 2021-05-24
# Exploit Author: Mesut Cetin
# Vendor Homepage: https://www.cookielawinfo.com/wordpress-plugin/
# Software Link: https://wordpress.org/plugins/cookie-law-bar/
# Version: 1.2.1
# Tested on: Ubuntu 16.04 LTS, Wordpress 5.7.2

# the "Bar Message" text field is vulnerable to stored XSS due to unsanitized user input
# an authenticated attacker can retrieve cookies / sensitive data of all Wordpress users

# proof of concept
# navigate to the settings of the Cookie Law Bar under


# inject the payload: </script><script>alert(document.cookie)</script> into the "Bar Message field" and save it

# browsing through the Wordpress pages shows the cookies

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