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CVE-2021-4180

18
FAUCET Score

CVE-2021-4180 is an information exposure vulnerability in openstack-tripleo-heat-templates versions prior to 11.6.1, affecting OpenStack and Red Hat OpenStack deployments. An attacker can discover internal IP addresses or hostnames by inspecting the www_authenticate_uri parameter in configuration files, which is visible to all users. This medium-severity flaw (CVSS 4.3) has a low attack complexity and requires no user interaction, potentially aiding further system exploitation. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 11.6.1CPE matchmatch criteria
cpe:2.3:a:openstack:tripleo_heat_templates:*:*:*:*:*:*:*:*
13CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*
16.1CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:16.1:*:*:*:*:*:*:*
16.2CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:16.2:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.77%
Probability of exploitation in next 30 days
EPSS Percentile
51.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0077 is in the 63rd percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

pippatch availablevia ghsa
Product: tripleo-heat-templatesFixed in: 11.6.1
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 16.1Fixed in: openstack-tripleo-heat-templates-0:11.3.2-1.20221013153262.el8ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 16.2Fixed in: openstack-tripleo-heat-templates-0:11.6.1-2.20220116004912.el8ost
View patch

Vendor Advisories (2)

pipGHSA-hm3x-jwwf-jpr9medium

Exposure of Sensitive Information to an Unauthorized Actor in OpenStack tripleo-heat-templates

Mar 24, 2022
redhatCVE-2021-4180Moderate

openstack-tripleo-heat-templates: data leak of internal URL through keystone_authtoken

Dec 20, 2021

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory