The Express Entries Dashboard in Concrete5 8.5.4 allows stored XSS via the name field of a new data object at an index.php/dashboard/express/entries/view/ URI.
{
"source": "CPE_RANGE",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "8.5.5"
}
],
"cpe": "cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*"
}