CVE-2020-35509

Name: CVE-2020-35509
Creator: NVD / NIST
Published: 2022-08-23T16:15:08.95+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2020-35509 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A flaw was found in keycloak affecting versions 11.0.3 and 12.0.0. An expired certificate would be accepted by the direct-grant authenticator because of missing time stamp validations. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

A flaw was found in keycloak affecting versions 11.0.3 and 12.0.0. An expired certificate would be accepted by the direct-grant authenticator because of missing time stamp validations. The highest threat from this vulnerability is to data confidentiality and integrity.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

0.29%

20.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Keycloak	11.0.3
Redhat	Keycloak	12.0.0

References

https://access.redhat.com/security/cve/cve-2020-35509Vendor Advisory
https://access.redhat.com/security/cve/cve-2020-35509Vendor Advisory

Timeline

Published: Aug 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-35509?

How severe is CVE-2020-35509?

CVE-2020-35509 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2020-35509?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-35509?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST