The EventON WordPress plugin before 2.1.2 does not validate that the event_id parameter in its eventon_ics_download ajax action is a valid Event, allowing unauthenticated visitors to access any Post (including unpublished or protected posts) content via the ics export functionality by providing the numeric id of the post.
[
{
"vendor": "Unknown",
"product": "EventON",
"versions": [
{
"status": "affected",
"versionType": "custom",
"version": "0",
"lessThan": "2.1.2"
}
],
"defaultStatus": "unaffected",
"collectionURL": "https://wordpress.org/plugins"
}
]