How severe is CVE-2020-25654?

CVE-2020-25654 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-25654 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25654?

CVE-2020-25654 primarily affects Clusterlabs Pacemaker. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-25654?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-25654 published?

CVE-2020-25654 was published on 2020-11-24 and last updated on 2026-06-17.

CVE-2020-25654

CVE-2020-25654 is a high-severity vulnerability in Clusterlabs Pacemaker with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Clusterlabs Pacemaker
Published: 2020-11-24
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2020-25654?: CVE-2020-25654 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-25654 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25654?: CVE-2020-25654 primarily affects Clusterlabs Pacemaker. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-25654?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-25654 published?: CVE-2020-25654 was published on 2020-11-24 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:clusterlabs:pacemaker:*:*:*:*:*:*:*:*
cpe:2.3:a:clusterlabs:pacemaker:2.0.5:rc1:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

More vulnerabilities in Clusterlabs Pacemaker

CVE-2016-7035 — High (CVSS 8.8): An authorization flaw was found in Pacemaker before 1.1.16, where it did not properly guard its IPC interface. An…
CVE-2018-16877 — High (CVSS 7.8): A flaw was found in the way pacemaker's client-server authentication was implemented in versions up to and including…
CVE-2016-7797 — High (CVSS 7.5): Pacemaker before 1.1.15, when using pacemaker remote, might allow remote attackers to cause a denial of service (node…
CVE-2015-1867 — High (CVSS 7.5): Pacemaker before 1.1.13 does not properly evaluate added nodes, which allows remote read-only users to gain privileges…
CVE-2010-2496 — Medium (CVSS 5.5): stonith-ng in pacemaker and cluster-glue passed passwords as commandline parameters, making it possible for local…
CVE-2011-5271 — Medium (CVSS 5.5): Pacemaker before 1.1.6 configure script creates temporary files insecurely

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