How severe is CVE-2023-0091?

CVE-2023-0091 has a CVSS 3.x base score of 3.8, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-0091 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-0091?

CVE-2023-0091 affects Redhat Keycloak. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-0091?

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

When was CVE-2023-0091 published?

CVE-2023-0091 was published on 2023-01-13 and last updated on 2026-06-17.

CVE-2023-0091

CVE-2023-0091 is a low-severity vulnerability in Redhat Keycloak with a CVSS 3.x base score of 3.8. 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-863.

Key facts

Severity: Low (CVSS 3.x base score 3.8)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Redhat Keycloak
Published: 2023-01-13
Last modified: 2026-06-17

Description

A flaw was found in Keycloak, where it did not properly check client tokens for possible revocation in its client credential flow. This flaw allows an attacker to access or modify potentially sensitive information.

Frequently asked questions

What is CVE-2023-0091?: A flaw was found in Keycloak, where it did not properly check client tokens for possible revocation in its client credential flow. This flaw allows an attacker to access or modify potentially sensitive information.
How severe is CVE-2023-0091?: CVE-2023-0091 has a CVSS 3.x base score of 3.8, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-0091 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-0091?: CVE-2023-0091 affects Redhat Keycloak. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-0091?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-0091 published?: CVE-2023-0091 was published on 2023-01-13 and last updated on 2026-06-17.

References

https://access.redhat.com/security/cve/CVE-2023-0091

Affected products (1)

cpe:2.3:a:redhat:keycloak:-:*:*:*:*:*:*:*

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