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CVE-2020-27838

MEDIUM
6.5
CVSS Score
Published: March 8, 2021 at 09:41 PM UTC
Updated: June 17, 2026 at 03:09 AM UTC
2 products affected across 2 vendorsSingle Sign onKeycloak

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Severity
MEDIUM6.5
Exploit prediction
EPSS 18%

Description

A flaw was found in keycloak in versions prior to 13.0.0. The client registration endpoint allows fetching information about PUBLIC clients (like client secret) without authentication which could be an issue if the same PUBLIC client changed to CONFIDENTIAL later. The highest threat from this vulnerability is to data confidentiality.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Keycloak· Keycloak
95%
v < 13.0.013.0.0
Affected range stops below 13.0.0, so it looks safe — our inference, not a vendor statement
Single Sign on· Red Hatrpm
95%
7.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCIssue TrackingVendor Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1906797

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

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