Medium

Exposure of Sensitive Information in keycloak

  • Disclosed: 20.09.2021
  • Updated: 11.10.2026 11:21

A flaw was found in keycloak before version 9.0.1. When configuring an Conditional OTP Authentication Flow as a post login flow of an IDP, the failure login events for OTP are not being sent to the brute force protection event queue. So BruteForceProtector does not handle this events.

Affected software

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PlatformPackageVulnerable versionsFixed in
Java / Kotlin (Maven) org.keycloak:keycloak-core < 9.0.1 9.0.1

References

CVSS score 5.6/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness (CWE)
CWE-200, CWE-755
Platform
Java / Kotlin (Maven)
Package
org.keycloak:keycloak-core
Disclosed
20.09.2021
Updated
11.10.2026 11:21

Sources and licenses

OSV / GitHub Advisory Database - GHSA-4gf2-xv97-63m2 - CC BY 4.0

Vulnerability history: org.keycloak:keycloak-core

All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (49) in the archive
Total entries
49
First → latest
10.2018 02.2025
Without a fix
5
Exploited in attacks
0

Severity breakdown

  • Critical 3
  • High 14
  • Medium 31
  • Low 1

Disclosures per year

  1. 2018: 9
  2. 2019: 4
  3. 2020: 4
  4. 2021: 5
  5. 2022: 17
  6. 2023: 4
  7. 2024: 5
  8. 2025: 1
  9. 2026: 0
Severity:
  1. High · 6.5 CVE-2023-6841 < 24.0.0 24.0.0
  2. High · 8.8 CVE-2023-4918 >= 22.0.2, < 22.0.3 22.0.3
  3. Critical · 9.1 CVE-2019-14837 < 8.0.0 8.0.0
  4. High · 8.8 CVE-2020-27826 < 12.0.0 12.0.0
  5. High · 7.3 CVE-2021-20202 < 13.0.0 13.0.0
  6. High · 8.8 CVE-2020-1714 < 11.0.0 11.0.0
  7. High · 8.1 CVE-2020-14389 < 12.0.0 12.0.0
  8. High · 7.2 CVE-2019-10170 < 8.0.0 8.0.0
  9. Exposure of Sensitive Information in keycloak this entry
    Medium · 5.6 CVE-2020-1744 < 9.0.1 9.0.1
  10. Critical · 9.6 CVE-2021-20195 < 13.0.0 13.0.0
  11. Critical · 9.8 CVE-2020-1731 < 8.0.2 8.0.2
  12. High · 8.1 CVE-2018-14637 < 4.6.0 4.6.0
  13. High · 7.5 CVE-2014-3651 < 1.0.3 1.0.3
  14. High · 7.5 CVE-2017-2646 < 2.5.5 2.5.5
  15. High · 8.1 CVE-2016-8609 < 2.3.0 2.3.0

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