CVE-2023-51774

json-jwt: bypass of identity checks via a sign/encryption confusion attack

Published Dec 25, 2023 CVSS 3.1 · 8.4 High EPSS < 1% KEV · Not listed
Description
The json-jwt (aka JSON::JWT) gem 1.16.3 for Ruby sometimes allows bypass of identity checks via a sign/encryption confusion attack. For example, JWE can sometimes be used to bypass JSON::JWT.decode.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Github GHSA Github GHSA GHSA-c8v6-786g-vjx6 json-jwt allows bypass of identity checks via a sign/encryption confusion attack
History
Type Values Removed Values Added
CPEs cpe:2.3:a:json-jwt_project:json-jwt:*:*:*:*:*:ruby:*:*
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Json-jwt Project
Json-jwt Project json-jwt
CPEs cpe:2.3:a:json-jwt_project:json-jwt:1.16.3:*:*:*:*:ruby:*:*
Vendors & Products Json-jwt Project
Json-jwt Project json-jwt
Type Values Removed Values Added
Weaknesses CWE-284
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'}

cvssV3_1

{'score': 8.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Aug 26, 2024, 8:08 PM
Reserved
Dec 25, 2023, 12:00 AM
Status
Analyzed
Published
Feb 29, 2024, 1:42 AM
Modified
Jun 17, 2026, 6:41 AM
Severity
Moderate
Public date
Feb 29, 2024, 12:00 AM