CVE-2026-64637 PUBLISHED

Assigner: hackerone
Reserved: 20.07.2026 Published: 07.08.2026 Updated: 07.08.2026

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.

Metrics

CVSS 3.0

CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS Score: 9.9

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.0

Product Status

Vendor	WebPros
Product	Plesk
Versions	Default: unaffected affected from 0 to 18.0.80.1 (excl.)

References

https://support.plesk.com/hc/en-us/articles/42432168683799

Problem Types

CWE-269 Improper Privilege Management CWE