Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor authentication for the user's account, but the intended behavior is for those sessions to be terminated.
{
"cpes": [
"cpe:2.3:a:redmine:redmine:4.2.0:*:*:*:*:*:*:*",
"cpe:2.3:a:redmine:redmine:4.2.1:*:*:*:*:*:*:*",
"cpe:2.3:a:redmine:redmine:*:*:*:*:*:*:*:*"
],
"severity": "High"
}