CVE-2021-4180

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. This flaw affects openstack-tripleo-heat-templates versions prior to 11.6.1.

Published: 2022-03-23 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-4180 is rated Low Risk (35.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.75%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-4180

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.17% 0.75% +0.59%
2 2026-01-24 0.29% 0.17% -0.13%
3 2025-12-09 — 0.29% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-4180

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2021-4180

GitHub Security Advisory for CVE-2021-4180

GHSA-hm3x-jwwf-jpr9 · Severity: medium · Ecosystem: pip — Exposure of Sensitive Information to an Unauthorized Actor in OpenStack tripleo-heat-templates

OS Trackers for CVE-2021-4180

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2021-4180
ubuntu medium CVE-2021-4180 medium priority: Ubuntu including 1 source packages (tripleo-heat-templates), 4 status rows across 4 suites (bionic, trusty, upstream, xenial): needs-triage 3, ignored 1. https://ubuntu.com/security/CVE-2021-4180

Affected software / configurations for CVE-2021-4180

Vendor Product Version Raw CPE
openstack tripleo_heat_templates < 11.6.1 cpe:2.3:a:openstack:tripleo_heat_templates:*:*:*:*:*:*:*:*
redhat openstack 13 cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*
redhat openstack 16.1 cpe:2.3:a:redhat:openstack:16.1:*:*:*:*:*:*:*
redhat openstack 16.2 cpe:2.3:a:redhat:openstack:16.2:-:*:*:*:*:*:*

References for CVE-2021-4180

URL Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2035793 Issue Tracking Patch Third Party Advisory
cvelogic Threat Intelligence