{"id":"CVE-2018-12027","aliases":["GHSA-whfx-877c-5p28"],"url":"https://o3.security/vulnerability/CVE-2018-12027","summary":"Insecure Permissions in Phusion Passenger","details":"An Insecure Permissions vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2 causes information disclosure in the following situation: given a Passenger-spawned application process that reports that it listens on a certain Unix domain socket, if any of the parent directories of said socket are writable by a normal user that is not the application's user, then that non-application user can swap that directory with something else, resulting in traffic being redirected to a non-application user's process through an alternative Unix domain socket.","published":"2018-06-17T20:29:00.417Z","modified":"2026-07-08T14:14:10.174281Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.01088,"percentile":0.6371,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"passenger","fixedVersion":"5.3.2"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://blog.phusion.nl/passenger-5-3-2"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201807-02"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T14:14:10.174281Z"}}