The Namaste! LMS WordPress plugin before 2.6 does not sanitize and escape some of its settings, which could allow high-privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).
https://wpscan.com/vulnerability/8d8e5852-3787-47f9-9931-8308bb81beb1