Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not sanitise the mic_comment field (Notes on time) when adding/editing an event, allowing users with privilege as low as author to add events with a Cross-Site Scripting payload in them, which will be triggered in the frontend when viewing the event.
[
{
"product": "Modern Events Calendar Lite",
"vendor": "Unknown",
"versions": [
{
"lessThan": "5.16.5",
"status": "affected",
"version": "5.16.5",
"versionType": "custom"
}
]
}
]