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Vulnerability record · CVE-2020-25654 · published 24 November 2020

CVE-2020-25654: Clusterlabs pacemaker improper access control vulnerability

Clusterlabs · Pacemaker

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.

7.2 CVSS 3.1 High EPSS 1.9% · top 21.4% CWE-284 · Improper access control
7.2CVSS 3.1 base score, v2 9.0
1.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1888191 Issue TrackingThird Party Advisory
https://lists.clusterlabs.org/pipermail/users/2020-October/027840.html Mailing ListVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/01/msg00007.html Mailing ListThird Party Advisory
https://seclists.org/oss-sec/2020/q4/83 Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202309-09
https://bugzilla.redhat.com/show_bug.cgi?id=1888191 Issue TrackingThird Party Advisory
https://lists.clusterlabs.org/pipermail/users/2020-October/027840.html Mailing ListVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/01/msg00007.html Mailing ListThird Party Advisory
https://seclists.org/oss-sec/2020/q4/83 Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202309-09

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Source: NIST National Vulnerability Database (record CVE-2020-25654), CISA KEV, FIRST EPSS (scores of 2026-10-02). This page is refreshed as NVD updates the record.