CVE-2021-4180Network attack vector

Internal endpoint disclosure via public authentication URI

Published Mar 23, 2022 · Updated Aug 3, 2024

Information exposure in OpenStack TripleO Heat Templates before 11.6.1 allows remote authenticated users to learn an internal IP or hostname. The templates populate the keystone_authtoken www_authenticate_uri setting with KeystoneInternal instead of the required public Identity endpoint. Any authenticated end user who can inspect the exposed setting can learn an internal network address, but the flaw does not grant data modification or service interruption.

CVSS severity4.3
Medium
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in OpenStack TripleO Heat Templates before 11.6.1 allows remote authenticated users to learn an internal IP or hostname. The templates populate the keystone_authtoken www_authenticate_uri setting with KeystoneInternal instead of the required public Identity endpoint. Any authenticated end user who can inspect the exposed setting can learn an internal network address, but the flaw does not grant data modification or service interruption.

The record

CVE
CVE-2021-4180
Published
Mar 23, 2022
Updated
Aug 3, 2024
Vendor
OpenStack
Product
TripleO Heat Templates
Classifications
CWE-200, CWE-668
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 23, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=openstack-tripleo-heat-templates versions prior to 11.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenStack · TripleO Heat Templatesversion=openstack-tripleo-heat-templates versions prior to 11.6.1

Published CVSS scores

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

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
CWE-668Exposure of Resource to Wrong Sphere

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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