CVE-2026-64639

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Incorrect Database Cloning Process in Plesk Allows Arbitrary Code Execution

Publication date: 2026-08-12

Last updated on: 2026-10-24

Assigner: HackerOne

Description

Incorrect database cloning process in Plesk from 18.0.52 before 18.0.79.6 and 18.0.80.2 allows a low-privileged user (customer, reseller) to execute arbitrary code on behalf of the database server administrator.

CVSS Scores

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Meta Information

Published

2026-08-12

Last Modified

2026-10-24

Generated

2026-11-08

AI Q&A

2026-08-12

EPSS Evaluated

2026-11-07

NVD

CVE-2026-64639

EUVD

EUVD-2026-57273

Affected Vendors & Products

Vendor	Product	Version / Range
plesk	plesk	to 18.0.79.6 (exc)
plesk	plesk	18.0.79.6
plesk	plesk	18.0.80.2

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-266	A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.

Attack-Flow Graph

Executive Summary

This vulnerability is in Plesk's database cloning process. It allows a low-privileged user like a customer or reseller to execute arbitrary code with the privileges of the database server administrator. This happens due to an incorrect cloning process in Plesk versions from 18.0.52 before 18.0.79.6 and 18.0.80.2.

Detection Guidance

Check Plesk version using command 'plesk version' on Linux or via Plesk interface on Windows. If version is between 18.0.52 and 18.0.79.5 or 18.0.80-18.0.80.1, the system is vulnerable.

Impact Analysis

If exploited, this vulnerability could allow an attacker with low privileges to gain full control over the database server. This could lead to unauthorized access to sensitive data, manipulation of databases, or further compromise of the server hosting Plesk.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating compliance requirements under GDPR, HIPAA, or other regulations. Organizations may face legal penalties, data breach notifications, and reputational damage if such an incident occurs.

Mitigation Strategies

Update Plesk to version 18.0.79.6 or 18.0.80.2 or later immediately. Remove database cloning privileges from low-privileged users until patched.

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