GetSimpleCMS <=3.3.15 has an open redirect in admin/changedata.php via the redirect function to the url parameter.
{
"cpe": "cpe:2.3:a:get-simple:getsimplecms:*:*:*:*:*:*:*:*",
"source": "CPE_RANGE",
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "3.3.15"
}
]
}