In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, user objects can appear as nested field values in other deserialized XML objects, allowing attackers with Overall/Read permission to create user objects by submitting crafted XML.
{
"cpes": [
"cpe:2.3:a:jenkins:jenkins:*:*:*:*:*:maven:*:*"
],
"severity": "Medium"
}