5.4

CVE-2020-35509: redhat keycloak Improper Input Validation

CVSS: 5.4v3.1MediumModified
AliasesGHSA-rpj2-w6fr-79hc
Published 23-08-2022Last modified 30-06-2025
Open JSON

Vulnerability summary

CVE-2020-35509 is a medium (CVSS 5.4) Improper Input Validation vulnerability in redhat keycloak. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.3% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.35%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3
RHSA-2021:3527RHSA-2021:3528RHSA-2021:3529

Timeline

  1. 23-08-2022
    PublishedVulnerability first disclosed.
  2. 30-06-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

+0.01 pp

From 0.34% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.35%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Org.keycloak1 product
  • keycloak-core< 14.0.0
Redhat1 product

2 vendors · 2 products

References

8 links