In Phusion Passenger before 5.1.0, a known /tmp filename was used during passenger-install-nginx-module execution, which could allow local attackers to gain the privileges of the passenger user.
{ "binaries": [ { "binary_name": "libapache2-mod-passenger", "binary_version": "6.0.10-3build2" }, { "binary_name": "passenger", "binary_version": "6.0.10-3build2" } ] }