---
id: CVE-2021-4180
aliases:
  - GHSA-hm3x-jwwf-jpr9
  - PYSEC-2026-753
title: >-
  Exposure of Sensitive Information to an Unauthorized Actor in OpenStack
  tripleo-heat-templates
summary: >-
  Exposure of Sensitive Information to an Unauthorized Actor in OpenStack
  tripleo-heat-templates
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
vendor: tripleo-heat-templates
product: tripleo-heat-templates
ecosystem: pip
affected:
  - tripleo-heat-templates < 11.6.1
patched:
  - tripleo-heat-templates 11.6.1
published: '2022-03-24'
updated: '2026-07-06'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-hm3x-jwwf-jpr9'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2021-4180'
  - url: >-
      https://github.com/openstack/tripleo-heat-templates/commit/160936df134a471cfd245bd60964046027a571ea
  - url: >-
      https://github.com/openstack/tripleo-heat-templates/commit/2b9461e97fc5c4ceb0848d1cc4484f656bb85515
  - url: 'https://bugs.launchpad.net/tripleo/+bug/1955397'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2035793'
  - url: 'https://github.com/openstack/tripleo-heat-templates'
tags:
  - osv
  - pip
epss: 0.00791
epssPercentile: 0.5436
ingestedAt: '2026-07-08T18:25:50.276Z'
---

## Overview

An information exposure flaw in openstack-tripleo-heat-templates allows an external user to discover the internal IP or hostname. An attacker could exploit this by checking the `www_authenticate_uri parameter` (which is visible to all end users) in configuration files. This would give sensitive information which may aid in additional system exploitation. A patch is available on the `master` branch and anticipated to be part of version 11.6.1.

## Affected packages

- `tripleo-heat-templates < 11.6.1`

## Remediation

Upgrade to a patched release:

- `tripleo-heat-templates 11.6.1`