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Fencer Intel
low 3.7

CVE-2015-7519 json

Phusion Passenger allows remote attackers to spoof headers

published 2016-01-08 10 y ago modified 2026-06-17 4 mo ago also GHSA-fxwv-953p-7qpf , EUVD-2018-0595

cvss
3.7
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

agent/Core/Controller/SendRequest.cpp in Phusion Passenger before 4.0.60 and 5.0.x before 5.0.22, when used in Apache integration mode or in standalone mode without a filtering proxy, allows remote attackers to spoof headers passed to applications by using an _ (underscore) character instead of a - (dash) character in an HTTP header, as demonstrated by an X_User header.

Patch / fix

  • rubygems passenger 4.0.60, 5.0.22
  • passenger Debian 14, Debian 13, Debian 12 5.0.22-1

debian advisories DEBIAN-CVE-2015-7519

  • rubygem-passenger WebYast 1.3, Studio Onsite 1.3, Lifecycle Management Server 1.3 3.0.14-0.14.1
  • rubygem-passenger SLE Module for Containers 12 5.0.18-6.1

suse advisories SUSE-SU-2016:0042-1SUSE-SU-2015:2337-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-7519 updated cvss 5.8

passenger: Header overwriting issue allowing user impersonation

  • Red Hat OpenStack Foreman rubygem-passenger, ruby193-rubygem-passenger Red Hat Ceph Storage 1.3 rubygem-passenger, ruby193-rubygem-passenger Red Hat Enterprise Linux OpenStack Platform 6 (Juno) Installer rubygem-passenger, ruby193-rubygem-passenger Red Hat OpenShift Enterprise 2 rubygem-passenger, ruby193-rubygem-passenger, ruby200-rubygem-passenger Red Hat Software Collections rh-passenger40-ruby22, rh-passenger40-ruby193, rh-passenger40-ruby200, rh-passenger40-passenger, rh-passenger40-mod_passenger
    affected: no fix planned “Will not fix”
  • Red Hat Satellite 6 mod_passenger, rubygem-passenger, tfm-rubygem-passenger, rubygem-passenger-native, tfm-rubygem-passenger-native, rubygem-passenger-native-libs, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.36% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 3.7 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub 3.0 3.7 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
rubygems passenger
<4.0.60
>=5.0.0, <5.0.22
4.0.60
5.0.22

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.