CVE-2020-25654

An ACL bypass flaw was found in pacemaker. An attacker having a local account on the cluster and in the haclient group could use IPC communication with various daemons directly to perform certain tasks that they would be prevented by ACLs from doing if they went through the configuration.

Published: 2020-11-24 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-25654 is rated Moderate Risk (58.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.00%). EPSS rose +1.92% over the last day, indicating growing attacker interest. 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-2020-25654

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 0.09% 2.00% +1.92%
2 2025-11-21 0.89% 0.09% -0.80%
3 2025-11-18 — 0.89% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-25654

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.2 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/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:H)
They need powerful rights—admin, root, or similar—before this pays off.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.2 5.9 [email protected]
9.0 2.0 HIGH
AV:N/AC:L/Au:S/C:C/I:C/A:C 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:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.0 10.0 [email protected]

Weakness enumeration for CVE-2020-25654

OS Trackers for CVE-2020-25654

vendor priority summary link
debian not yet assigned CVE-2020-25654 not yet assigned priority: Debian including 1 source packages (pacemaker), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-25654
gentoo high CVE-2020-25654: 1 GLSA(s) (202309-09), 1 atom(s) (sys-cluster/pacemaker); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-25654
redhat medium — https://access.redhat.com/security/cve/CVE-2020-25654
suse high — https://www.suse.com/security/cve/CVE-2020-25654/
ubuntu medium CVE-2020-25654 medium priority: Ubuntu including 1 source packages (pacemaker), 6 status rows across 6 suites (bionic, focal, groovy, trusty, upstream, xenial): released 4, DNE 1, needs-triage 1. https://ubuntu.com/security/CVE-2020-25654

Affected software / configurations for CVE-2020-25654

Vendor Product Version Raw CPE
clusterlabs pacemaker < 1.1.23 cpe:2.3:a:clusterlabs:pacemaker:*:*:*:*:*:*:*:*
clusterlabs pacemaker >= 2.0.0, < 2.0.3 cpe:2.3:a:clusterlabs:pacemaker:*:*:*:*:*:*:*:*
clusterlabs pacemaker 2.0.5 cpe:2.3:a:clusterlabs:pacemaker:2.0.5:rc1:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

References for CVE-2020-25654

cvelogic Threat Intelligence