CVE-2021-3503Network attack vector

Metrics disclosure via incorrect undefined ModelNode

Published Apr 18, 2022 · Updated Aug 3, 2024

Information disclosure in WildFly 23.0.0.Final and earlier allows remote authenticated users to read restricted metrics over HTTP. WildFlyMetric.readAttributeValue returns a typed undefined ModelNode for RBAC-denied attributes, causing isDefined() to handle the result incorrectly. The issue requires the RBAC provider, and the disclosed consequence is limited to metrics data outside the user's assigned role.

CVSS severity4.3
Medium
EPSS probability1.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in WildFly 23.0.0.Final and earlier allows remote authenticated users to read restricted metrics over HTTP. WildFlyMetric.readAttributeValue returns a typed undefined ModelNode for RBAC-denied attributes, causing isDefined() to handle the result incorrectly. The issue requires the RBAC provider, and the disclosed consequence is limited to metrics data outside the user's assigned role.

The record

CVE
CVE-2021-3503
Published
Apr 18, 2022
Updated
Aug 3, 2024
Vendor
389 Directory Server
Product
WildFly
Classifications
CWE-200
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=Fixed in 23.0.1.Final

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · WildFlyversion=Fixed in 23.0.1.Final

Published CVSS scores

4.3Red HatCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.3GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0NVDAV:N/AC:L/Au:S/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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