CVE-2025-66430

Plesk broken access control

9.1 CRITICALEPSS 0.55%

Published12 Dec 2025

Description

Plesk 18.0 has Incorrect Access Control.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Affected products

Plesk≥ 18.0.70 < 18.0.73.5 · ≥ 18.0.74 < 18.0.74.2

Remediation

Fixed in

Plesk≥ 18.0.73.5

Patch & vendor advisories

https://support.plesk.com/hc/en-us/articles/36261922405015--CVE-2025-66430-Security-vulnerability-in-Password-Protected-Directories-allows-Plesk-users-to-gain-root-level-access-to-a-Plesk-server

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-66430 being actively exploited?

CVE-2025-66430 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.55%.

How severe is CVE-2025-66430?

CVE-2025-66430 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.55% probability of exploitation.

Which products are affected by CVE-2025-66430?

Affected products include Plesk.

How do I fix CVE-2025-66430?

Upgrade affected software to a fixed version, for example Plesk 18.0.73.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-66430 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.