concrete5 8.1.0 places incorrect trust in the HTTP Host header during caching, if the administrator did not define a "canonical" URL on installation of concrete5 using the "Advanced Options" settings. Remote attackers can make a GET request with any domain name in the Host header; this is stored and allows for arbitrary domains to be set for certain links displayed to subsequent visitors, potentially an XSS vector.
{
"extracted_events": [
{
"cpe": "cpe:2.3:a:concretecms:concrete_cms:8.1.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "8.1.0"
},
{
"last_affected": "8.1.0"
}
],
"source": "CPE_STRING"
}
]
}