CVE-2020-1714

Improper Input Validation in Keycloak

7.5 HighFix available

A flaw was found in Keycloak before version 11.0.0, where the code base contains usages of ObjectInputStream without type checks. This flaw allows an attacker to inject arbitrarily serialized Java Objects, which would then get deserialized in a privileged context and potentially lead to remote code execution.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

2.60%Up 1.2 points since Apr 14, 2021

What each source reports

CVE List Score used 7.5

Record: CVE-2020-1714
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-20
Updated: 2026-11-02

EUVDEUVD-2022-1095 7.5

Record: EUVD-2022-1095
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-m6mm-q862-j366 8.8

Improper Input Validation in Keycloak

Record: GHSA-m6mm-q862-j366
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-20
Updated: 2026-11-02

NVD 8.8

Record: CVE-2020-1714
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Weakness: CWE-20
Updated: 2026-11-02

OSV 8.8

Record: CVE-2020-1714
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-m6mm-q862-j366 8.8

Improper Input Validation in Keycloak

Record: GHSA-m6mm-q862-j366
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-20
Updated: 2026-11-02

OSVRHSA-2020:2814 7.5

Red Hat Security Advisory: RH-SSO 7.4.1 adapters for Red Hat JBoss Enterprise Application Platform 7

Record: RHSA-2020:2814
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVRHSA-2020:2816 7.5

Red Hat Security Advisory: RH-SSO 7.4.1 adapters for Red Hat JBoss Enterprise Application Platform 6

Record: RHSA-2020:2816
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`org.keycloak:keycloak-core` Maven	before 11.0.0	11.0.0
`org.keycloak:keycloak-common` Maven	before 11.0.0	11.0.0
`org.keycloak:keycloak-core` Maven	before 11.0.0, plus listed versions 1.0-alpha-11.0-alpha-1-120620131.0-alpha-21.0-alpha-31.0-alpha-4 Show 45 moreShow less 1.0-beta-11.0-beta-1-201505211.0-beta-1-201505231.0-beta-21.0-beta-31.0-beta-41.0-final1.0-rc-11.0-rc-21.0.1.Final1.0.2.Final1.0.3.Final1.0.4.Final1.0.5.Final1.1.0.Beta11.1.0.Beta21.1.0.Final1.1.1.Final1.2.0.Beta11.2.0.CR11.2.0.Final1.3.0.Final1.3.1.Final1.4.0.Final1.5.0-Final1.5.0.Final1.5.1.Final1.6.0.Final1.6.1.Final1.7.0.CR11.7.0.Final1.8.0.Alpha11.8.0.CR11.8.0.CR21.8.0.CR31.8.0.Final1.8.1.Final1.9.0.CR11.9.0.Final1.9.1.Final1.9.2.Final1.9.3.Final1.9.4.Final1.9.5.Final1.9.7.Final	11.0.0
`org.keycloak:keycloak-common` Maven	before 11.0.0, plus listed versions 1.6.0.Final1.6.1.Final1.7.0.CR11.7.0.Final1.8.0.Alpha1 Show 45 moreShow less 1.8.0.CR11.8.0.CR21.8.0.CR31.8.0.Final1.8.1.Final1.9.0.CR11.9.0.Final1.9.1.Final1.9.2.Final1.9.3.Final1.9.4.Final1.9.5.Final1.9.7.Final1.9.8.Final10.0.010.0.110.0.22.0.0.CR12.0.0.Final2.1.0.CR12.1.0.Final2.2.0.CR12.2.0.Final2.2.1.Final2.3.0.CR12.3.0.Final2.4.0.CR12.4.0.Final2.5.0.CR12.5.0.Final2.5.1.Final2.5.4.Final2.5.5.Final3.0.0.CR13.0.0.Final3.1.0.CR13.1.0.Final3.2.0.CR13.2.0.Final3.2.1.Final3.3.0.CR13.3.0.CR23.3.0.Final3.4.0.CR13.4.0.Final	11.0.0
`eap7-keycloak-adapter-sso7_4` Red Hat:jboss_enterprise_application_platform:7.3::el6	before 0:9.0.4-1.redhat_00001.1.el6eap	0:9.0.4-1.redhat_00001.1.el6eap
`eap7-keycloak-saml-adapter-sso7_4` Red Hat:jboss_enterprise_application_platform:7.3::el6	before 0:9.0.4-1.redhat_00001.1.el6eap	0:9.0.4-1.redhat_00001.1.el6eap
`eap7-keycloak-adapter-sso7_4` Red Hat:jboss_enterprise_application_platform:7.3::el7	before 0:9.0.4-1.redhat_00001.1.el7eap	0:9.0.4-1.redhat_00001.1.el7eap
`eap7-keycloak-saml-adapter-sso7_4` Red Hat:jboss_enterprise_application_platform:7.3::el7	before 0:9.0.4-1.redhat_00001.1.el7eap	0:9.0.4-1.redhat_00001.1.el7eap
`eap7-keycloak-adapter-sso7_4` Red Hat:jboss_enterprise_application_platform:7.3::el8	before 0:9.0.4-1.redhat_00001.1.el8eap	0:9.0.4-1.redhat_00001.1.el8eap
`eap7-keycloak-saml-adapter-sso7_4` Red Hat:jboss_enterprise_application_platform:7.3::el8	before 0:9.0.4-1.redhat_00001.1.el8eap	0:9.0.4-1.redhat_00001.1.el8eap

Show 4 moreShow less

Affected packages
Package	Affected	Fixed
`keycloak-adapter-sso7_4-eap6` Red Hat:jboss_enterprise_application_platform:6::el6	before 0:9.0.4-1.redhat_00001.1.ep6.el6	0:9.0.4-1.redhat_00001.1.ep6.el6
`keycloak-saml-adapter-sso7_4-eap6` Red Hat:jboss_enterprise_application_platform:6::el6	before 0:9.0.4-1.redhat_00001.1.ep6.el6	0:9.0.4-1.redhat_00001.1.ep6.el6
`keycloak-adapter-sso7_4-eap6` Red Hat:jboss_enterprise_application_platform:6::el7	before 0:9.0.4-1.redhat_00001.1.ep6.el7	0:9.0.4-1.redhat_00001.1.ep6.el7
`keycloak-saml-adapter-sso7_4-eap6` Red Hat:jboss_enterprise_application_platform:6::el7	before 0:9.0.4-1.redhat_00001.1.ep6.el7	0:9.0.4-1.redhat_00001.1.ep6.el7

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, products	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-1714 is a high vulnerability (CVSS 7.5) in Keycloak, published May 13, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.60%, the 85th percentile. Fixed in org.keycloak:keycloak-core 11.0.0.

References

Show 11 moreShow less

This page doesn't list everything

Left out here: 94 versions. The JSON record has them.