How severe is CVE-2020-14302?

CVE-2020-14302 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-14302 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-14302?

CVE-2020-14302 affects Redhat Keycloak. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-14302?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-14302 published?

CVE-2020-14302 was published on 2020-12-15 and last updated on 2026-06-17.

CVE-2020-14302

CVE-2020-14302 is a medium-severity vulnerability in Redhat Keycloak with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-294.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
CVSS v2: 4.0
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-294
Affected product: Redhat Keycloak
Published: 2020-12-15
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2020-14302?: 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.
How severe is CVE-2020-14302?: CVE-2020-14302 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-14302 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-14302?: CVE-2020-14302 affects Redhat Keycloak. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-14302?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-14302 published?: CVE-2020-14302 was published on 2020-12-15 and last updated on 2026-06-17.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1849584

Affected products (1)

cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*

More vulnerabilities in Redhat Keycloak

CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…
CVE-2022-1245 — Critical (CVSS 9.8): A privilege escalation flaw was found in the token exchange feature of keycloak. Missing authorization allows a client…
CVE-2019-14910 — Critical (CVSS 9.8): A vulnerability was found in keycloak 7.x, when keycloak is configured with LDAP user federation and StartTLS is used…
CVE-2021-20195 — Critical (CVSS 9.6): A flaw was found in keycloak in versions before 13.0.0. A Self Stored XSS attack vector escalating to a complete…
CVE-2022-3782 — Critical (CVSS 9.1): keycloak: path traversal via double URL encoding. A flaw was found in Keycloak, where it does not properly validate…
CVE-2019-14837 — Critical (CVSS 9.1): A flaw was found in keycloack before version 8.0.0. The owner of 'placeholder.org' domain can setup mail server on this…

All CVEs affecting Redhat Keycloak →

Other CWE-294 (Authentication Bypass by Capture-replay) vulnerabilities

CVE-2025-49752 — Critical (CVSS 10.0): Azure Bastion Elevation of Privilege Vulnerability
CVE-2026-11856 — Critical (CVSS 9.8): Successfully using libcurl to do a transfer to a specific HTTP origin (`hostA`) with **Digest** authentication and then…
CVE-2026-32987 — Critical (CVSS 9.8): OpenClaw before 2026.3.13 allows bootstrap setup codes to be replayed during device pairing verification in…
CVE-2025-67135 — Critical (CVSS 9.8): Weak Security in the PF-50 1.2 keyfob of PGST PG107 Alarm System 1.25.05.hf allows attackers to compromise access…
CVE-2025-65552 — Critical (CVSS 9.8): D3D Wi-Fi Home Security System ZX-G12 v2.1.1 is vulnerable to RF replay attacks on the 433 MHz sensor communication…
CVE-2024-38438 — Critical (CVSS 9.8): D-Link - CWE-294: Authentication Bypass by Capture-replay

Browse all CWE-294 (Authentication Bypass by Capture-replay) vulnerabilities →