CVE-2021-3503: A flaw was found in Wildfly where insufficient RBAC restrictions may lead to expose metrics data

Q: How do I fix CVE-2021-3503?

wildfly: upgrade to 23.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-3503 being exploited?

CVE-2021-3503 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-2021-3503 affect?

CVE-2021-3503 affects wildfly. Severity is medium (CVSS 4.3). A flaw was found in Wildfly where insufficient RBAC restrictions may lead to expose metrics data. The highest threat from this vulnerability is to the confidentiality.

Q: How urgent is CVE-2021-3503?

Priority 36/100. On your watchlist

Routine

MEDIUM 4.3WATCHLISTUPGRADE

CVE-2021-3503 is a medium-severity flaw (CVSS 4.3) affecting wildfly. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in Wildfly where insufficient RBAC restrictions may lead to expose metrics data. The highest threat from this vulnerability is to the confidentiality.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-200
Published	2022-04-18
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2022-04-18 17:15 UTCPublished CVE record published
2026-06-17 04:05 UTCUpdated Record last modified

redhat wildfly UPGRADE

Affected: < 23.0.1

Fixed in: 23.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 23.0.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wildfly

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-2021-3503?

wildfly: upgrade to 23.0.1. Exact commands for each OS are on this page.

Is CVE-2021-3503 being exploited?

CVE-2021-3503 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-2021-3503 affect?

CVE-2021-3503 affects wildfly. Severity is medium (CVSS 4.3). A flaw was found in Wildfly where insufficient RBAC restrictions may lead to expose metrics data. The highest threat from this vulnerability is to the confidentiality.

How urgent is CVE-2021-3503?

Priority 36/100. On your watchlist

Software pages

JBoss and WildFly vulnerabilities

Related CVEs

CVE-2025-23367 MEDIUM 6.5 UPGRADE UPGRADE A flaw was found in the Wildfly Server Role Based Access Control (RBAC) provider
CVE-2022-1278 HIGH 7.5 UPGRADE DOWNGRADE A flaw was found in WildFly, where an attacker can see deployment names, endpoints, and any other data the tra
CVE-2022-0866 MEDIUM 5.3 DOWNGRADE DOWNGRADE This is a concurrency issue that can result in the wrong caller principal being returned from the session cont
CVE-2021-3644 LOW 3.3 DOWNGRADE DOWNGRADE A flaw was found in wildfly-core in all versions
CVE-2020-27822 MEDIUM 5.9 DOWNGRADE A flaw was found in Wildfly affecting versions 19.0.0.Final, 19.1.0.Final, 20.0.0.Final, 20.0.1.Final, and 21.

References

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