CVE-2020-14302

A flaw was found in Keycloak before 13.0.0 where an external identity provider, after successful...

4.9 Medium

A flaw was found in Keycloak before 13.0.0 where an external identity provider, after successful authentication, redirects to a Keycloak endpoint that accepts multiple invocations with the use of the same "state" parameter. This flaw allows a malicious user to perform replay attacks.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: None

Exploit likelihood

1.00%Up 0.6 points since Apr 14, 2021

What each source reports

NVD Score used 4.9

Record: CVE-2020-14302
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0: 4.0 MediumAV:N/AC:L/Au:S/C:N/I:P/A:N
Weakness: CWE-294
Updated: 2026-11-02

CVE List No score

Record: CVE-2020-14302
Weakness: CWE-294
Updated: 2026-11-02

EUVDEUVD-2020-6454 No score

Record: EUVD-2020-6454
Updated: 2026-11-03

GitHub AdvisoriesGHSA-74gp-x82w-5v28 4.9

A flaw was found in Keycloak before 13.0.0 where an external identity provider, after successful...

Record: GHSA-74gp-x82w-5v28
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-294
Updated: 2026-11-02

OSV 4.9

Record: CVE-2020-14302
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVRHSA-2021:0967 5.4

Red Hat Security Advisory: Red Hat Single Sign-On 7.4.6 security update on RHEL 6

Record: RHSA-2021:0967
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVRHSA-2021:0968 5.4

Red Hat Security Advisory: Red Hat Single Sign-On 7.4.6 security update on RHEL 7

Record: RHSA-2021:0968
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVRHSA-2021:0969 5.4

Red Hat Security Advisory: Red Hat Single Sign-On 7.4.6 security update on RHEL 8

Record: RHSA-2021:0969
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`rh-sso7-keycloak` Red Hat:red_hat_single_sign_on:7::el6 From an advisory covering 2 CVEs	before 0:9.0.12-1.redhat_00001.1.el6sso	0:9.0.12-1.redhat_00001.1.el6sso
`rh-sso7-keycloak-server` Red Hat:red_hat_single_sign_on:7::el6 From an advisory covering 2 CVEs	before 0:9.0.12-1.redhat_00001.1.el6sso	0:9.0.12-1.redhat_00001.1.el6sso
`rh-sso7-keycloak` Red Hat:red_hat_single_sign_on:7::el7 From an advisory covering 2 CVEs	before 0:9.0.12-1.redhat_00001.1.el7sso	0:9.0.12-1.redhat_00001.1.el7sso
`rh-sso7-keycloak-server` Red Hat:red_hat_single_sign_on:7::el7 From an advisory covering 2 CVEs	before 0:9.0.12-1.redhat_00001.1.el7sso	0:9.0.12-1.redhat_00001.1.el7sso
`rh-sso7-keycloak` Red Hat:red_hat_single_sign_on:7::el8 From an advisory covering 2 CVEs	before 0:9.0.12-1.redhat_00001.1.el8sso	0:9.0.12-1.redhat_00001.1.el8sso
`rh-sso7-keycloak-server` Red Hat:red_hat_single_sign_on:7::el8 From an advisory covering 2 CVEs	before 0:9.0.12-1.redhat_00001.1.el8sso	0:9.0.12-1.redhat_00001.1.el8sso

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
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-2020-14302 is a medium vulnerability (CVSS 4.9) in Keycloak, published December 15, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.00%, the 63rd percentile. No source names a fixed version.

References

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