CVE-2019-5418

Exp

There is a File Content Disclosure vulnerability in Action View <5.2.2.1, <5.1.6.2, <5.0.7.2, <4.2.11.1 and v3 where specially crafted accept headers can cause contents of arbitrary files on the target system's filesystem to be exposed.

Published: 2019-03-27 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-5418 is rated Critical Active Threat (94.1/100): CVSS High severity, with high exploitation likelihood (EPSS 98.51%, 100th percentile). CISA KEV confirms active exploitation (added 2025-07-07) affecting Rails / Ruby on Rails. a weakness (CWE-22) Unauthenticated remote administrative access may be possible. EPSS rose +4.17% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2019-5418

Name: Rails Ruby on Rails Path Traversal Vulnerability · CISA KEV detail

Exploit added: 2025-07-07

Action due: 2025-07-28

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Public exploit references (Exploit-DB) for CVE-2019-5418

EDB-ID Source Kind Published Link
46585 exploit_db edb 2019-03-21 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-5418

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 94.34% 98.51% +4.17%
2 2025-11-21 93.61% 94.34% +0.73%
3 2025-11-18 — 93.61% —

Full EPSS history (22 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-5418

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2019-5418

GitHub Security Advisory for CVE-2019-5418

GHSA-86g5-2wh3-gc9j · Severity: high · Ecosystem: rubygems — Path Traversal in Action View

OS Trackers for CVE-2019-5418

vendor priority summary link
debian not yet assigned CVE-2019-5418 not yet assigned priority: Debian including 1 source packages (rails), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-5418
redhat high — https://access.redhat.com/security/cve/CVE-2019-5418
suse medium — https://www.suse.com/security/cve/CVE-2019-5418/
ubuntu high CVE-2019-5418 high priority: Ubuntu including 7 source packages (rails, rails-4.0, …), 126 status rows across 18 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, trusty, upstream, xenial): DNE 103, not-affected 12, needs-triage 6, released 3, ignored 2. https://ubuntu.com/security/CVE-2019-5418

Affected software / configurations for CVE-2019-5418

Vendor Product Version Raw CPE
rubyonrails rails >= 3.0.0, < 4.2.11.1 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails >= 5.0.0, < 5.0.7.2 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails >= 5.1.0, < 5.1.6.2 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails >= 5.2.0, < 5.2.2.1 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
redhat cloudforms 4.7 cpe:2.3:a:redhat:cloudforms:4.7:*:*:*:*:*:*:*
opensuse leap 15.0 cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
fedoraproject fedora 30 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
redhat cloudforms 4.6 cpe:2.3:a:redhat:cloudforms:4.6:*:*:*:*:*:*:*
redhat software_collections 1.0 cpe:2.3:a:redhat:software_collections:1.0:*:*:*:*:*:*:*

References for CVE-2019-5418

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00011.html Mailing List Third Party Advisory
http://packetstormsecurity.com/files/152178/Rails-5.2.1-Arbitrary-File-Content-Disclosure.html Exploit Third Party Advisory VDB Entry
http://www.openwall.com/lists/oss-security/2019/03/22/1 Mailing List Mitigation Patch Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0796 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1147 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1149 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1289 Third Party Advisory
https://groups.google.com/forum/#%21topic/rubyonrails-security/pFRKI96Sm8Q Permissions Required
https://lists.debian.org/debian-lts-announce/2019/03/msg00042.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y43636TH4D6T46IC6N2RQVJTRFJAAYGA/ Third Party Advisory
https://weblog.rubyonrails.org/2019/3/13/Rails-4-2-5-1-5-1-6-2-have-been-released/ Broken Link Patch Vendor Advisory
https://www.exploit-db.com/exploits/46585/ Exploit Third Party Advisory VDB Entry
https://web.archive.org/web/20190313201629/https://weblog.rubyonrails.org/2019/3/13/Rails-4-2-5-1-5-1-6-2-have-been-released/ Patch Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-5418 US Government Resource
cvelogic Threat Intelligence