3.8

CVE-2023-0091: redhat keycloak Incorrect Authorization

Modified
AliasesGHSA-v436-q368-hvgg
Published 11-01-2023Last modified 09-04-2025

Vulnerability summary

CVE-2023-0091 is a low (CVSS 3.8) Incorrect Authorization vulnerability in redhat keycloak. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 40.4% of scored vulnerabilities.

Overall risk
15/100
0100
Low · default modelHow is this calculated?
CVSS score
3.8/10
010
Low · v3.1 (CVE.org)
EPSS score
0.48%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3
RHSA-2023:1043RHSA-2023:1044RHSA-2023:1045

Timeline

  1. 11-01-2023
    PublishedVulnerability first disclosed.
  2. 09-04-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.47% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Org.keycloak1 product
  • keycloak-core< 20.0.3
Redhat1 product

2 vendors · 2 products

References

4 links