CVE-2006-4122: Simple One-File Guestbook

High severity, CVSS 7.5. EPSS: 3.2% chance of exploitation in the next 30 days.

Simple one-file guestbook 1.0 and earlier allows remote attackers to bypass authentication and delete guestbook entries via a modified id parameter to guestbook.php.

Affected products

• Simple One-File Guestbook Simple One-File Guestbook: up to and including 1.0

Published 2006-08-14. Last modified 2026-06-16.