How severe is CVE-2023-0657?

CVE-2023-0657 has a CVSS 3.x base score of 3.4, rated low severity. It is exploitable over an adjacent network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-0657 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-0657?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-0657 have an EU (EUVD) identifier?

Yes. CVE-2023-0657 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1142.

When was CVE-2023-0657 published?

CVE-2023-0657 was published on 2024-11-17 and last updated on 2026-06-17.

CVE-2023-0657

CVE-2023-0657 is a low-severity vulnerability with a CVSS 3.x base score of 3.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-273.

Key facts

Severity: Low (CVSS 3.x base score 3.4)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-1142
Weakness: CWE-273
Published: 2024-11-17
Last modified: 2026-06-17

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.

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.
How severe is CVE-2023-0657?: CVE-2023-0657 has a CVSS 3.x base score of 3.4, rated low severity. It is exploitable over an adjacent network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-0657 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-0657?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-0657 have an EU (EUVD) identifier?: Yes. CVE-2023-0657 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1142.
When was CVE-2023-0657 published?: CVE-2023-0657 was published on 2024-11-17 and last updated on 2026-06-17.

References

Other CWE-273 vulnerabilities

CVE-2015-0278 — Critical (CVSS 10.0): libuv before 0.10.34 does not properly drop group privileges, which allows context-dependent attackers to gain…
CVE-2023-34844 — Critical (CVSS 9.8): Play With Docker < 0.0.2 has an insecure CAP_SYS_ADMIN privileged mode causing the docker container to escape.
CVE-2021-36372 — Critical (CVSS 9.8): In Apache Ozone versions prior to 1.2.0, Initially generated block tokens are persisted to the metadata database and…
CVE-2020-24361 — Critical (CVSS 9.8): SNMPTT before 1.4.2 allows attackers to execute shell code via EXEC, PREXEC, or unknown_trap_exec.
CVE-2011-3350 — Critical (CVSS 9.8): masqmail 0.2.21 through 0.2.30 improperly calls seteuid() in src/log.c and src/masqmail.c that results in improper…
CVE-2011-2921 — Critical (CVSS 9.8): ktsuss versions 1.4 and prior has the uid set to root and does not drop privileges prior to executing user specified…

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