CVE-2018-16476

Exp

A Broken Access Control vulnerability in Active Job versions >= 4.2.0 allows an attacker to craft user input which can cause Active Job to deserialize it using GlobalId and give them access to information that they should not have. This vulnerability has been fixed in versions 4.2.11, 5.0.7.1, 5.1.6.1, and 5.2.1.1.

Published: 2018-11-30 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-16476 is rated High Exploit Risk (70.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.79%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2018-16476

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-16476

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 2025-11-21 0.89% 0.79% -0.09%
2 2025-11-18 0.84% 0.89% +0.05%
3 2025-06-06 — 0.84% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-16476

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/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]
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-2018-16476

GitHub Security Advisory for CVE-2018-16476

GHSA-q2qw-rmrh-vv42 · Severity: high · Ecosystem: rubygems — Improper Access Control in activejob

OS Trackers for CVE-2018-16476

vendor priority summary link
debian not yet assigned CVE-2018-16476 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-2018-16476
redhat medium — https://access.redhat.com/security/cve/CVE-2018-16476
suse medium — https://www.suse.com/security/cve/CVE-2018-16476/
ubuntu medium CVE-2018-16476 medium priority: Ubuntu including 7 source packages (rails, rails-4.0, …), 133 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 109, not-affected 7, ignored 6, needs-triage 6, needed 4, released 1. https://ubuntu.com/security/CVE-2018-16476

Affected software / configurations for CVE-2018-16476

Vendor Product Version Raw CPE
rubyonrails rails >= 4.2.0, < 4.2.11 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails >= 5.0.0, < 5.0.7.1 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails >= 5.1.0, < 5.1.6.1 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails >= 5.2.0, < 5.2.1.1 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
redhat cloudforms 4.6 cpe:2.3:a:redhat:cloudforms:4.6:*:*:*:*:*:*:*

References for CVE-2018-16476

cvelogic Threat Intelligence