CVE-2007-6398: Flat PHP Board

Medium severity, CVSS 5.0. EPSS: 2.4% chance of exploitation in the next 30 days.

Flat PHP Board 1.2 and earlier allows remote attackers to bypass authentication and obtain limited access to an arbitrary user account via the fpb_username cookie.

Affected products

• Flat PHP Board: up to and including 1.2

Published 2007-12-17. Last modified 2026-06-16.