What is CVE-2020-35509?

CVE-2020-35509 is a medium-severity vulnerability in Red Hat Keycloak, classified under Improper Input Validation. CVSS score: 5.4/10. Published 2022-08-23.

How severe is CVE-2020-35509?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2020-35509 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Red Hat Keycloak

CVE-2020-35509

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.003 (21.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Redhat Keycloak — versions 11.0.3, 12.0.0
N/a Keycloak — versions 11.0.3, 12.0.0

Weakness classification (CWE)

Public proof-of-concept exploits

References

secalert@redhat.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-35509?: CVE-2020-35509 is a medium-severity vulnerability in Red Hat Keycloak, classified under Improper Input Validation. CVSS score: 5.4/10. Published 2022-08-23.
How severe is CVE-2020-35509?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2020-35509 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.