CVE-2021-27025

A flaw was discovered in Puppet Agent where the agent may silently ignore Augeas settings or may be vulnerable to a Denial of Service condition prior to the first 'pluginsync'.

Published: 2021-11-18 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-27025 is rated Moderate Risk (48.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.15%). Review affected assets and schedule remediation.

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-2021-27025

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 0.48% 1.15% +0.67%
2 2025-12-15 0.17% 0.48% +0.31%
3 2025-11-21 — 0.17% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-27025

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H 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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P 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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2021-27025

GitHub Security Advisory for CVE-2021-27025

GHSA-q4g7-jrxv-67r9 · Severity: medium · Ecosystem: rubygems — Silent Configuration Failure in Puppet Agent

OS Trackers for CVE-2021-27025

vendor priority summary link
debian unimportant CVE-2021-27025 unimportant priority: Debian including 2 source packages (puppet, puppet-agent), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 3, open 1. https://security-tracker.debian.org/tracker/CVE-2021-27025
redhat medium — https://access.redhat.com/security/cve/CVE-2021-27025
suse medium — https://www.suse.com/security/cve/CVE-2021-27025/
ubuntu medium CVE-2021-27025 medium priority: Ubuntu including 1 source packages (puppet), 15 status rows across 15 suites (bionic, focal, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 6, needs-triage 5, ignored 3, released 1. https://ubuntu.com/security/CVE-2021-27025

Affected software / configurations for CVE-2021-27025

Vendor Product Version Raw CPE
puppet puppet >= 2021.0.0, < 2021.4.0 cpe:2.3:a:puppet:puppet:*:*:*:*:enterprise:*:*:*
puppet puppet_agent < 6.25.1 cpe:2.3:a:puppet:puppet_agent:*:*:*:*:*:*:*:*
puppet puppet_agent >= 5.5.0, <= 5.5.22 cpe:2.3:a:puppet:puppet_agent:*:*:*:*:*:*:*:*
puppet puppet_agent >= 7.0.0, < 7.12.1 cpe:2.3:a:puppet:puppet_agent:*:*:*:*:*:*:*:*
puppet puppet_enterprise < 2019.8.9 cpe:2.3:a:puppet:puppet_enterprise:*:*:*:*:*:*:*:*
fedoraproject fedora 35 cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

References for CVE-2021-27025

cvelogic Threat Intelligence