CVE-2026-64637: WebPros Plesk

Critical severity, CVSS 9.9. EPSS: 0.5% chance of exploitation in the next 30 days.

Improper privilege management in the XML-RPC API of Plesk before 18.0.80, allows an authenticated reseller to obtain an administrative session for the root user account.

Affected products

• WebPros Plesk: before 18.0.80.1 (fixed in 18.0.80.1)

Published 2026-08-07. Last modified 2026-09-03.