CVE-2016-6582
The Doorkeeper gem before 4.2.0 for Ruby might allow remote attackers to conduct replay attacks or revoke arbitrary tokens by leveraging failure to implement the OAuth 2.0 Token Revocation specification.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.81%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The Doorkeeper gem before 4.2.0 for Ruby might allow remote attackers to conduct replay attacks or revoke arbitrary tokens by leveraging failure to implement the OAuth 2.0 Token Revocation specification.
- CVSS 3.0
- 9.1 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- EPSS
- 4.81% probability · 92th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-254
- Affected
- doorkeeper project/doorkeeper
- Source
- cve@mitre.org
EPSS 4.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://packetstormsecurity.com/files/138430/Doorkeeper-4.1.0-Token-Revocation.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2016/Aug/105Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/archive/1/539268/100/0/threaded
- http://www.securityfocus.com/bid/92551Third Party Advisory, VDB Entry
- https://github.com/doorkeeper-gem/doorkeeper/issues/875Issue Tracking, Patch, Third Party Advisory
- https://github.com/doorkeeper-gem/doorkeeper/releases/tag/v4.2.0Issue Tracking, Patch, Release Notes, Third Party Advisory
- http://packetstormsecurity.com/files/138430/Doorkeeper-4.1.0-Token-Revocation.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2016/Aug/105Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/archive/1/539268/100/0/threaded
- http://www.securityfocus.com/bid/92551Third Party Advisory, VDB Entry
- https://github.com/doorkeeper-gem/doorkeeper/issues/875Issue Tracking, Patch, Third Party Advisory
- https://github.com/doorkeeper-gem/doorkeeper/releases/tag/v4.2.0Issue Tracking, Patch, Release Notes, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.