The CMP WordPress plugin before 4.0.19 allows any user, even not logged in, to arbitrarily change the coming soon page layout.
[
{
"vendor": "Unknown",
"product": "CMP",
"versions": [
{
"status": "affected",
"versionType": "custom",
"version": "0",
"lessThan": "4.0.19"
}
],
"defaultStatus": "unaffected",
"collectionURL": "https://wordpress.org/plugins"
}
]