Pivotal Concourse, all versions prior to 4.2.2, puts the user access token in a url during the login flow. A remote attacker who gains access to a user's browser history could obtain the access token and use it to authenticate as the user.
{
"cpe": "cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "4.2.2"
}
],
"source": "CPE_RANGE"
}