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CVE-2016-6582

24
FAUCET Score

CVE-2016-6582 describes a critical vulnerability in the Doorkeeper gem prior to version 4.2.0 for Ruby, which could enable remote attackers to perform replay attacks or revoke arbitrary tokens due to a failure in implementing the OAuth 2.0 Token Revocation specification. This vulnerability carries a CVSSv3 score of 9.1 (CRITICAL), indicating a network-based attack with low complexity, requiring no user interaction, and leading to high impact on integrity and availability. While the FAUCET Risk Score is 74/100, there is no evidence of active exploitation, no known exploit code in Metasploit, Nuclei, or ExploitDB, and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.1.0CPE matchmatch criteria
cpe:2.3:a:doorkeeper_project:doorkeeper:*:*:*:*:*:ruby:*:*

CVSS Data

CVSS version used by this source: 3.0

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.72%
Probability of exploitation in next 30 days
EPSS Percentile
90.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0472 is in the 85th percentile among its peer group of 36,829 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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: doorkeeperFixed in: 4.2.0

Vendor Advisories (1)

rubygemsGHSA-3m6r-39p3-jq25critical

Doorkeeper is vulnerable to replay attacks

Oct 24, 2017

References

packetstormsecurity.com / files/138430/Doorkeeper-4.1.0-Token-Revocation.html
Third Party AdvisoryVDB Entry
seclists.org / fulldisclosure/2016/Aug/105
Mailing ListPatchThird Party Advisory
github.com / doorkeeper-gem/doorkeeper/issues/875
Issue TrackingPatchThird Party Advisory
github.com / doorkeeper-gem/doorkeeper/releases/tag/v4.2.0
Issue TrackingPatchRelease NotesThird Party Advisory
securityfocus.com / archive/1/539268/100/0/threaded
securityfocus.com / bid/92551
Third Party AdvisoryVDB Entry