CVE-2011-4755: Parallels Plesk Small Business Panel

High severity, CVSS 10.0. EPSS: 1.8% chance of exploitation in the next 30 days.

Parallels Plesk Small Business Panel 10.2.0 does not properly validate string data that is intended for storage in an XML document, which allows remote attackers to cause a denial of service (parsing error) or possibly have unspecified other impact via a crafted cookie, as demonstrated by cookies to client@1/domain@1/hosting/file-manager/ and certain other files.

Affected products

• Parallels Parallels Plesk Small Business Panel: version 10.2.0 only

Published 2011-12-16. Last modified 2026-06-16.