Responsive Cookie Consent <= 1.7 – Authenticated Stored Cross-Site Scripting (XSS) | CVE 2018-10309

Description

A persistent cross-site scripting vulnerability has been found in the web interface of the plugin that allows the execution of arbitrary HTML/script code to be executed in the victim's browser when they visit the web site.

Tested on version 1.5, 1.6 and 1.7 (older versions may also be affected)

Proof of Concept

1) Access WordPress control panel.
2) Navigate to the Responsive Cookie Consent plugin page.
3) Select one of the input fields. For example, "Cookie Bar Border Bottom Size".
4) Insert the script you wish to inject.
5) Save the plugin settings.
6) Injected script will run in the victim user's browser. Depending on which input field you inserted the script, the script may also run everytime you load the Responsive Cookie Consent plugin page.