How severe is CVE-2025-66430?

CVE-2025-66430 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-66430 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66430?

CVE-2025-66430 primarily affects Plesk. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-66430?

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

Does CVE-2025-66430 have an EU (EUVD) identifier?

Yes. CVE-2025-66430 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203102.

When was CVE-2025-66430 published?

CVE-2025-66430 was published on 2025-12-12 and last updated on 2026-06-17.

CVE-2025-66430

CVE-2025-66430 is a critical-severity vulnerability in Plesk with a CVSS 3.x base score of 9.1. 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: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203102
Weakness: CWE-284
Affected product: Plesk
Published: 2025-12-12
Last modified: 2026-06-17

Description

Plesk 18.0 has Incorrect Access Control.

Frequently asked questions

What is CVE-2025-66430?: Plesk 18.0 has Incorrect Access Control.
How severe is CVE-2025-66430?: CVE-2025-66430 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-66430 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66430?: CVE-2025-66430 primarily affects Plesk. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-66430?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-66430 have an EU (EUVD) identifier?: Yes. CVE-2025-66430 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203102.
When was CVE-2025-66430 published?: CVE-2025-66430 was published on 2025-12-12 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:plesk:plesk:*:*:*:*:*:*:*:*
cpe:2.3:a:plesk:plesk:*:-:*:*:*:*:*:*

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