Medium

Keycloaks's One Time Passcode (OTP) is valid longer than expiration timeSeverity

  • Disclosed: 14.10.2024
  • Updated: 11.10.2026 13:20

A vulnerability was found in Keycloak. Expired OTP codes are still usable when using FreeOTP when the OTP token period is set to 30 seconds (default). Instead of expiring and deemed unusable around 30 seconds in, the tokens are valid for an additional 30 seconds totaling 1 minute. A one time passcode that is valid longer than its expiration time increases the attack window for malicious actors to abuse the system and compromise accounts. Additionally, it increases the attack surface because at any given time, two OTPs are valid.

Affected software

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PlatformPackageVulnerable versionsFixed in
Java / Kotlin (Maven) org.keycloak:keycloak-core < 24.0.7, >= 25.0.0, < 25.0.4 24.0.7, 25.0.4

References

CVSS score 4.8/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE)
CWE-324
Platform
Java / Kotlin (Maven)
Package
org.keycloak:keycloak-core
Disclosed
14.10.2024
Updated
11.10.2026 13:20

Sources and licenses

OSV / GitHub Advisory Database - GHSA-xmmm-jw76-q7vg - 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. Keycloaks's One Time Passcode (OTP) is valid longer than expiration timeSeverity this entry
    Medium · 4.8 CVE-2024-7318 < 24.0.7, >= 25.0.0, < 25.0.4 24.0.7, 25.0.4
  2. High · 6.5 CVE-2023-6841 < 24.0.0 24.0.0
  3. High · 8.8 CVE-2023-4918 >= 22.0.2, < 22.0.3 22.0.3
  4. Critical · 9.1 CVE-2019-14837 < 8.0.0 8.0.0
  5. High · 8.8 CVE-2020-27826 < 12.0.0 12.0.0
  6. High · 7.3 CVE-2021-20202 < 13.0.0 13.0.0
  7. High · 8.8 CVE-2020-1714 < 11.0.0 11.0.0
  8. High · 8.1 CVE-2020-14389 < 12.0.0 12.0.0
  9. High · 7.2 CVE-2019-10170 < 8.0.0 8.0.0
  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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