xymond in Xymon 4.1.x, 4.2.x, and 4.3.x before 4.3.25 allow remote authenticated users to execute arbitrary commands via shell metacharacters in the adduser_name argument in (1) web/useradm.c or (2) web/chpasswd.c.
{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "xymon",
            "binary_version": "4.3.25-1"
        },
        {
            "binary_name": "xymon-client",
            "binary_version": "4.3.25-1"
        },
        {
            "binary_name": "xymon-client-dbgsym",
            "binary_version": "4.3.25-1"
        },
        {
            "binary_name": "xymon-dbgsym",
            "binary_version": "4.3.25-1"
        }
    ]
}