{"cve":"CVE-2015-7519","nvd":{"published":"2016-01-08T19:59:05.600","modified":"2026-06-17T00:32:41.323","status":"Modified","description":"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_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7},"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"],"products":["phusionpassenger:phusion_passenger"],"source":"nvd","synced_at":"2026-10-19T20:37:48.328043465+00:00"},"epss":{"cve":"CVE-2015-7519","score":0.02364,"percentile":0.83796,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-fxwv-953p-7qpf","url":"https://osv.dev/vulnerability/GHSA-fxwv-953p-7qpf","summary":"Phusion Passenger allows remote attackers to spoof headers","modified":"2024-02-22T05:33:44.982602Z","packages":[{"ecosystem":"RubyGems","name":"passenger","purl":"pkg:gem/passenger","ranges":["<4.0.60"],"fixed":["4.0.60"]},{"ecosystem":"RubyGems","name":"passenger","purl":"pkg:gem/passenger","ranges":[">=5.0.0 <5.0.22"],"fixed":["5.0.22"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}