Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2019-9837

17
FAUCET Score

CVE-2019-9837 describes an open redirect vulnerability in Doorkeeper::OpenidConnect versions 1.4.x and 1.5.x before 1.5.4. This flaw allows an attacker to redirect users to arbitrary malicious sites via the redirect_uri parameter during an OAuth authorization request, specifically when the 'openid' scope and prompt=none are used, leading to phishing opportunities. Rated 6.1 MEDIUM, the vulnerability has a network attack vector, low attack complexity, and requires user interaction, potentially impacting confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.4.0, < 1.5.4CPE matchmatch criteria
cpe:2.3:a:openid:openid_connect:*:*:*:*:*:doorkeeper:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.35%
Probability of exploitation in next 30 days
EPSS Percentile
68.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0135 is in the 81st percentile among its peer group of 26,219 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rubygemspatch availablevia ghsa
Product: doorkeeper-openid_connectFixed in: 1.5.4

Vendor Advisories (1)

rubygemsGHSA-vv4c-g6q7-p3q7medium

Doorkeeper-openid_connect contains Open Redirect

Mar 25, 2019

References

github.com / doorkeeper-gem/doorkeeper-openid_connect/blob/master/CHANGELOG.md
Third Party Advisory
github.com / doorkeeper-gem/doorkeeper-openid_connect/issues/61
Third Party Advisory
github.com / doorkeeper-gem/doorkeeper-openid_connect/pull/66
PatchThird Party Advisory