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🛡️ CVE-2023-0657 — keycloak-services

🟢 CVSS 3.4 — Low ✅ No Known Exploit CWE-273 NVD
3.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Keycloak vulnerable to impersonation via logout token exchange

Keycloak was found to not properly enforce token types when validating signatures locally. An authenticated attacker could use this flaw to exchange a logout token for an access token and possibly gain access to data outside of enforced permissions.

How this vulnerability can be exploited

This issue can be reached from an adjacent network, attack complexity is high, an attacker needs low-level privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N

  • Attack vector: Adjacent network — the attacker has to sit on the same local or logical network.
  • Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: Required — someone has to click, open or visit something.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
  • Integrity impact: Low — limited, and the attacker does not choose what is affected.
  • Availability impact: None.

Weakness class

CVE-2023-0657 is classified as CWE-273: Improper Check for Dropped Privileges. The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded.

Affected software

CVE-2023-0657 is recorded against 2 packages.

  • org.keycloak:keycloak-services (from 23.0.0 up to 24.0.3)
  • unknown

Timeline and source

Published on 17 April 2024 and last revised on 4 February 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
access.redhat.com (Web)
access.redhat.com (Web)
access.redhat.com (Web)
bugzilla.redhat.com (Web)
github.com (Package)

Other advisories for this package

org.keycloak:keycloak-services has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-273: Improper Check for Dropped Privileges) in other software:

Details

Severity LOW
CVSS Score 3.4
CVSS Vector CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
CWE CWE-273
Public Exploit ✅ No
Source NVD
Published 2024-04-17
Updated 2026-08-20
Modified 2026-02-04
Fix URL N/A

Affected Packages

Software From version Fixed in
org.keycloak:keycloak-services 23.0.0 24.0.3
unknown — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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