CVE-2020-1728: A vulnerability was found in all versions of Keycloak where, the pages on the Admin Console area of the applic

Q: How do I fix CVE-2020-1728?

keycloak: upgrade to 10.0.0; quarkus: upgrade to newer than 1.4.2. Exact commands for each OS are on this page.

Q: Is CVE-2020-1728 being exploited?

CVE-2020-1728 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-1728 affect?

CVE-2020-1728 affects keycloak, quarkus. Severity is medium (CVSS 4.8). 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

Q: How urgent is CVE-2020-1728?

Priority 41/100. Remotely exploitable, no login, no user action; On your watchlist

This month

MEDIUM 4.8REMOTEWATCHLISTUPGRADEUPGRADE

CVE-2020-1728 is a medium-severity flaw (CVSS 4.8) affecting keycloak, quarkus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-358, CWE-1021
Published	2020-04-06
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: quarkus · redhat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-04-06 14:15 UTCPublished CVE record published
2026-06-17 03:02 UTCUpdated Record last modified

redhat keycloak UPGRADE

Affected: < 10.0.0

Fixed in: 10.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy keycloak || rpm -q keycloak || keycloak --version

2. UPGRADE to 10.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade keycloak

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade keycloak

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

quarkus quarkus UPGRADE

Affected: <= 1.4.2

Fixed in: newer than 1.4.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy quarkus || rpm -q quarkus || quarkus --version

2. UPGRADE to newer than 1.4.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade quarkus

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade quarkus

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-1728?

keycloak: upgrade to 10.0.0; quarkus: upgrade to newer than 1.4.2. Exact commands for each OS are on this page.

Is CVE-2020-1728 being exploited?

CVE-2020-1728 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-1728 affect?

CVE-2020-1728 affects keycloak, quarkus. Severity is medium (CVSS 4.8). 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

How urgent is CVE-2020-1728?

Priority 41/100. Remotely exploitable, no login, no user action; On your watchlist

Software pages

Keycloak vulnerabilities

Related CVEs

CVE-2023-6927 MEDIUM 4.6 MITIGATE DOWNGRADE A flaw was found in Keycloak
CVE-2023-6563 HIGH 7.7 UPGRADE DOWNGRADE An unconstrained memory consumption vulnerability was discovered in Keycloak
CVE-2023-6291 HIGH 7.1 UPGRADE DOWNGRADE A flaw was found in the redirect_uri validation logic in Keycloak
CVE-2023-6134 MEDIUM 4.6 UPGRADE UPGRADE A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is app
CVE-2025-8419 MEDIUM 5.3 MITIGATE A vulnerability was found in Keycloak-services

References

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