LXDM before 0.5.2 did not start X server with -auth, which allows local users to bypass authentication with X connections.
{ "binaries": [ { "binary_version": "0.5.3-1", "binary_name": "lxdm" }, { "binary_version": "0.5.3-1", "binary_name": "lxdm-dbg" }, { "binary_version": "0.5.3-1", "binary_name": "lxdm-dbgsym" } ], "availability": "No subscription required" }