CVE-2023-0657 (CVSS 3.4)

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.

Is your site exposed to CVE-2023-0657?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

3.4

LOW

CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N

Weakness Type (CWE)

CWE-273 CWE-273

References

Other References

https://access.redhat.com/errata/RHSA-2024:1867 https://access.redhat.com/errata/RHSA-2024:1868 https://access.redhat.com/security/cve/CVE-2023-0657 https://bugzilla.redhat.com/show_bug.cgi?id=2166728

Frequently Asked Questions

What is CVE-2023-0657? +

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. It has a CVSS v3.1 base score of 3.4 (LOW).

How severe is CVE-2023-0657? +

CVE-2023-0657 has a CVSS v3.1 score of 3.4 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

How do I check if I'm vulnerable to CVE-2023-0657? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-1003

A potential vulnerability has been identified in HP Anyware Agent for Linux which might allow for authentication bypass which may …

CVE-2026-58086

As an inadvertent side effect of an unrelated code change, PRIV_KTRACE was always denied to a jailed root user. Tracing …

CVE-2025-27396 8.8

A vulnerability has been identified in SCALANCE LPE9403 (6GK5998-3GS00-2AC2) (All versions < V4.0). Affected devices do not properly limit the …

CVE-2026-32107 8.8

xrdp is an open source RDP server. In versions through 0.10.5, the session execution component did not properly handle an …

CVE-2024-8382 8.8

Internal browser event interfaces were exposed to web content when privileged EventHandler listener callbacks ran for those events. Web content …

CVE-2026-0099 7.8

In onNullBinding of HostEmulationManager.java, there is a possible way to launch an activity from the background due to a logic …

CVE-2023-0657