MantisBT through 2.3.0 allows arbitrary password reset and unauthenticated admin access via an empty confirm_hash value to verify.php.
{
"source": "CPE_RANGE",
"cpe": "cpe:2.3:a:mantisbt:mantisbt:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "2.3.0"
}
]
}