The Coming soon and Maintenance mode WordPress plugin before 3.5.3 does not have authorisation and CSRF checks in its coming_soon_send_mail AJAX action, allowing any authenticated users, with a role as low as subscriber to send arbitrary emails to all subscribed users
[
{
"vendor": "Unknown",
"product": "Coming soon and Maintenance mode",
"versions": [
{
"status": "affected",
"versionType": "custom",
"version": "0",
"lessThan": "3.5.3"
}
],
"defaultStatus": "unaffected",
"collectionURL": "https://wordpress.org/plugins"
}
]