Skip to main content

Keycloak CVE-2020-1728

MEDIUM
Improperly Implemented Security Check for Standard (CWE-358)
2020-04-06 secalert@redhat.com
Information Disclosure Red Hat Keycloak Quarkus
5.4
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
CWE-358
ASVS 5.0
V12 - Secure Communication Improperly implemented security check
Impact

CVSS score of 5.4 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.8% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

A vulnerability was found in all versions of Keycloak where, the pages on the Admin Console area of the application are completely missing general HTTP security headers in HTTP-responses. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

maven org.keycloak:keycloak-core no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in maven

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Sign in to check
Technical ContextAI · show details

This vulnerability is classified under CWE-358. A vulnerability was found in all versions of Keycloak where, the pages on the Admin Console area of the application are completely missing general HTTP security headers in HTTP-responses. This does not directly lead to a security issue, yet it might aid attackers in their efforts to exploit other problems. The flaws unnecessarily make the servers more prone to Clickjacking, channel downgrade attacks and other similar client-based attack vectors. Affected products include: Redhat Keycloak, Quarkus.

Severity by source

NVD PRIMARY 5.4 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

DescriptionNVD

A vulnerability was found in all versions of Keycloak where, the pages on the Admin Console area of the application are completely missing general HTTP security headers in HTTP-responses. This does not directly lead to a security issue, yet it might aid attackers in their efforts to exploit other problems. The flaws unnecessarily make the servers more prone to Clickjacking, channel downgrade attacks and other similar client-based attack vectors.

Threat Intelligence Overview

EPSS Score
0.8%
Top 49% exploitable
Data Quality
2 sources
Confidence: Low
NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.8%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +27
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

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

More in Keycloak

View all
CVE-2023-48795 MEDIUM POC
5.9 Dec 18

The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remot
CVE-2014-3709 HIGH POC
8.8 Oct 18

The org.keycloak.services.resources.SocialResource.callback method in JBoss KeyCloak before 1.0.3.Final allows remote at
CVE-2023-6563 HIGH POC
7.7 Dec 14

An unconstrained memory consumption vulnerability was discovered in Keycloak. Rated high severity (CVSS 7.7), this vulne
CVE-2022-1466 MEDIUM POC
6.5 Apr 26

Due to improper authorization, Red Hat Single Sign-On is vulnerable to users performing actions that they should not be

CVE-2017-7474 CRITICAL
9.8 May 12

It was found that the Keycloak Node.js adapter 2.5 - 3.0 did not handle invalid tokens correctly. Rated critical severit
CVE-2026-76187 CRITICAL
9.8 Sep 15

Authentication bypass in the Apache Airflow Keycloak auth manager provider (apache-airflow-providers-keycloak below 0.10
CVE-2022-1245 CRITICAL
9.8 Jul 08

A privilege escalation flaw was found in the token exchange feature of keycloak. Rated critical severity (CVSS 9.8), thi
CVE-2019-14910 CRITICAL
9.8 Dec 05

A vulnerability was found in keycloak 7.x, when keycloak is configured with LDAP user federation and StartTLS is used in
CVE-2021-20195 CRITICAL
9.6 May 28

A flaw was found in keycloak in versions before 13.0.0. Rated critical severity (CVSS 9.6), this vulnerability is remote
CVE-2023-6134 MEDIUM POC
5.4 Dec 14

A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to t
CVE-2022-0225 MEDIUM POC
5.4 Aug 26

A flaw was found in Keycloak. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack c
CVE-2020-10770 MEDIUM POC
5.3 Dec 15

A flaw was found in Keycloak before 13.0.0, where it is possible to force the server to call out an unverified URL using

Same weakness CWE-358 – Improperly Implemented Security Check for Standard

View all
CVE-2025-10457 HIGH POC
8.1
CVE-2019-14823 HIGH POC
7.4
CVE-2024-5500 MEDIUM POC
6.5
CVE-2018-0268 CRITICAL
10.0
CVE-2016-10229 CRITICAL
9.8
CVE-2026-70174 HIGH
8.8
CVE-2025-62583 CRITICAL
9.8
CVE-2025-66603 CRITICAL
9.8

Same technique Information Disclosure

View all
CVE-2019-2725 CRITICAL POC
9.8
CVE-2021-34523 CRITICAL POC
9.0
CVE-2013-2251 CRITICAL POC
9.8
CVE-2017-5638 CRITICAL POC
9.8
CVE-2025-24813 CRITICAL POC
9.8
CVE-2025-68613 HIGH POC
8.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5

References

Advisories & patches
ADVISORY https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1728

Search Externally

GitHub PoC Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy