CVE-2015-9284

The request phase of the OmniAuth Ruby gem (1.9.1 and earlier) is vulnerable to Cross-Site Request Forgery when used as part of the Ruby on Rails framework, allowing accounts to be connected without user intent, user interaction, or feedback to the user. This permits a secondary account to be able to sign into the web application as the primary account.

Published: 2019-04-26 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-9284 is rated Moderate Risk (61.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.57%). EPSS rose +1.13% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2015-9284

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 0.44% 1.57% +1.13%
2 2026-03-04 0.24% 0.44% +0.21%
3 2026-03-01 — 0.24% —

Full EPSS history (34 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-9284

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H 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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2015-9284

GitHub Security Advisory for CVE-2015-9284

GHSA-ww4x-rwq6-qpgf · Severity: high · Ecosystem: rubygems — OmniAuth Ruby gem Cross-site Request Forgery in request phase

OS Trackers for CVE-2015-9284

vendor priority summary link
debian not yet assigned CVE-2015-9284 not yet assigned priority: Debian including 1 source packages (ruby-omniauth), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. https://security-tracker.debian.org/tracker/CVE-2015-9284
redhat high — https://access.redhat.com/security/cve/CVE-2015-9284
ubuntu medium CVE-2015-9284 medium priority: Ubuntu including 1 source packages (ruby-omniauth), 19 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 11, needed 7, DNE 1. https://ubuntu.com/security/CVE-2015-9284

Affected software / configurations for CVE-2015-9284

Vendor Product Version Raw CPE
omniauth omniauth < 2.0.0 cpe:2.3:a:omniauth:omniauth:*:*:*:*:*:ruby:*:*

References for CVE-2015-9284

cvelogic Threat Intelligence