CVE-2015-7519
Status: ModifiedLow (3.7)—
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.
CVSS
- Version: 3.0
- Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- Base score: 3.7
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 2.36%
- Percentile among all scored CVEs: 83
- Score date: 10/5/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)
CWEs
- CWE-20
References
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00024.html
- http://www.openwall.com/lists/oss-security/2015/12/07/1
- http://www.openwall.com/lists/oss-security/2015/12/07/2
- https://blog.phusion.nl/2015/12/07/cve-2015-7519/
- https://bugzilla.suse.com/show_bug.cgi?id=956281
- https://github.com/phusion/passenger/commit/ddb8ecc4ebf260e4967f57f271d4f5761abeac3e
- https://lists.debian.org/debian-lts-announce/2018/06/msg00007.html
- https://puppet.com/security/cve/passenger-dec-2015-security-fixes
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00024.html
- http://www.openwall.com/lists/oss-security/2015/12/07/1
- http://www.openwall.com/lists/oss-security/2015/12/07/2
- https://blog.phusion.nl/2015/12/07/cve-2015-7519/
- https://bugzilla.suse.com/show_bug.cgi?id=956281
- https://github.com/phusion/passenger/commit/ddb8ecc4ebf260e4967f57f271d4f5761abeac3e
- https://lists.debian.org/debian-lts-announce/2018/06/msg00007.html
- https://puppet.com/security/cve/passenger-dec-2015-security-fixes
Raw JSON (NVD)
Show
{
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"lastModified": "2026-06-17T00:32:41.323",
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