CVE-2023-0657

Keycloak: impersonation via logout token exchange

LOW
3.4
CVSS Score
Published: November 17, 2024 at 10:19 AM UTC
Updated: June 17, 2026 at 05:26 AM UTC
2 products affected across 2 vendorsKeycloakSingle Sign on

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Severity
LOW3.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

A flaw was found in Keycloak. This issue occurs due to improperly enforcing token types when validating signatures locally. This could allow an authenticated attacker to exchange a logout token for an access token and possibly gain access to data outside of enforced permissions.

Affected

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

Remediation

No guide yet

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.4LOWredhat
Attack Vector
ADJACENT_NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-273

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